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8

Summary of Equipment Functions

MAJ-2308 INSTRUCTION MANUAL

For details of the functions, also refer to the instruction manuals of ancillary equipment as well as to the 
present manual.

Infrared (IR) Imaging

IR observation using IR illumination is possible.

Refer to Section 6.2, “Operation of IR imaging mode”.

Blue light (BL) Imaging

BL observation using blue light illumination is possible.

Refer to Section 6.4, “Operation of BL imaging mode”.

Adjusting the image

The following functions are provided to facilitate IR and BL imaging.

• Iris sensitivity adjustment

Refer to “

Setting the iris sensitivity” on page 35.

• Brightness adjustment

Refer to “

Adjusting the IR brightness” on page 39.

Refer to “

Adjusting the BL brightness” on page 51.

• Maximum gain adjustment

Refer to “

Setting the IR AGC MAX gain” on page 40.

Refer to “

Setting the BL AGC MAX gain” on page 52.

• Maximum exposure time adjustment

Refer to “

Setting the IR MAX exposure time” on page 43.

Refer to “

Setting the BL MAX exposure time” on page 55.

• Enhancement of edge lines and patterns of the images

Refer to “

Selecting the IR enhancement” on page 45.

Refer to “

Selecting the BL enhancement” on page 59.

IR playback

The IR image recorded on the video recorder is repeatedly played in the observation monitor.

• Setting IR playback

Refer to Section 4.3, “Setting of video recorder”.

• Using IR playback

Refer to Section 6.3, “Operation of IR playback function”.

Summary of Equipment Functions

Содержание MAJ-2308

Страница 1: ...Use 3 Summary of Equipment Functions 8 Chapter 1 Checking the Package Contents 9 Chapter 2 Nomenclature and Functions 13 Chapter 3 Installation and Connection 17 Chapter 4 Function Setup 29 Chapter 5...

Страница 2: ......

Страница 3: ...sold separately 10 1 4 Recorder Remote Cable 3P MAJ 2310 sold separately 11 Chapter 2 Nomenclature and Functions 13 2 1 Symbols and descriptions 13 2 2 Infrared and Blue Light Filter Unit 14 2 3 Infra...

Страница 4: ...ction of IR imaging function 72 5 4 Inspection of IR playback function 74 5 5 Inspection of BL imaging function 80 5 6 After inspection 82 Chapter 6 Operation 83 6 1 Precautions for operation 83 6 2 O...

Страница 5: ...tact Olympus Infrared and Blue Light Filter Unit MAJ 2308 Back cover of this instruction manual Labels and Symbols Symbol Description Symbol Description Manufacturer Authorized representative in the E...

Страница 6: ...MANUAL Infrared Imaging Unit MAJ 2304 sold separately Blue Light Imaging Unit MAJ 2305 sold separately Manufacturer name Serial number plate Crossed out wheeled bin symbol Serial number plate Manufac...

Страница 7: ...ions about any information in this manual contact Olympus Terms used in this manual Important Information Please Read Before Use Surgical microscope OME V200 The surgical microscope designated by Olym...

Страница 8: ...ge enhancement is an image processing technique that electrically emphasizes the edges of an image to increase sharpness Structure enhancement Structure enhancement is an image processing technique th...

Страница 9: ...ancillary equipment shown in System chart on page 105 Using incompatible equipment can result in patient or operator injury and or equipment damage as well as malfunction This instrument complies wit...

Страница 10: ...his instrument under the following conditions An explosion or a fire could occur The concentration of oxygen is high Oxidizing agents such as nitrous oxide N2O are present in the atmosphere Flammable...

Страница 11: ...RI wireless set short wave therapeutic equipment cellular portable phone etc This may impair the performance of this instrument Do not use this instrument in any place with strong magnetic force or br...

Страница 12: ...ightness adjustment Refer to Adjusting the IR brightness on page 39 Refer to Adjusting the BL brightness on page 51 Maximum gain adjustment Refer to Setting the IR AGC MAX gain on page 40 Refer to Set...

Страница 13: ...ackage with the components shown below Inspect each item for damage If the instrument is damaged a component is missing or you have any questions do not use the instrument immediately contact Olympus...

Страница 14: ...ing Unit MAJ 2304 sold separately INFRARED IMAGING UNIT MAJ 2304 IR emblem Allen screwdriver 3 mm width across flats Access information sheet 1 3 Blue Light Imaging Unit MAJ 2305 sold separately BLUE...

Страница 15: ...1 4 Recorder Remote Cable 3P MAJ 2310 sold separately 11 MAJ 2308 INSTRUCTION MANUAL Ch 1 1 4 Recorder Remote Cable 3P MAJ 2310 sold separately Recorder remote cable 3P Access information sheet...

Страница 16: ...12 1 4 Recorder Remote Cable 3P MAJ 2310 sold separately MAJ 2308 INSTRUCTION MANUAL Ch 1...

Страница 17: ...lature and Functions This chapter is intended to explain the names and functions of the parts Infrared and Blue Light Filter Unit Infrared Imaging Unit Blue Light Imaging Unit Touch panel 2 1 Symbols...

Страница 18: ...ing observation mode 2 Filter selection indices Align the index on the filter selector knob with the desired imaging mode name The following imaging modes can be selected IR Infrared imaging mode WLI...

Страница 19: ...nit Blue Light Imaging Unit No Name Description 1 Connector Use this connector for connection to the unit terminal of the LED light source No Name Description 1 Protective sheet Protects the adhesive...

Страница 20: ...16 2 3 Infrared Imaging Unit Blue Light Imaging Unit MAJ 2308 INSTRUCTION MANUAL Ch 2...

Страница 21: ...re to turn the connected surgical microscope and the ancillary equipment OFF before proceeding to the connection work Otherwise equipment failure or malfunction may result Hold this instrument and oth...

Страница 22: ...result in equipment malfunction Table 3 1 Equipment with installation and connection descriptions in this manual Compatible equipment MAJ 2308 INFRARED AND BLUE LIGHT FILTER UNIT ORBEYE SURGICAL MICRO...

Страница 23: ...ource are turned OFF by referring to their instruction manual 3 Using the provided Allen screwdriver 1 5 mm width across flats loosen the lock screws 2 of the cover of the microscope section completel...

Страница 24: ...e If the filter unit cannot be slid due to the drag of a screw s pull the screw s so that both screws are completely free Otherwise equipment damage may result NOTE Keep the removed cover carefully be...

Страница 25: ...llen screwdriver may be damaged 6 Slide the filter unit all the way in the direction of the arrow At this time confirm that the caution lines yellow of the lock screws are visible Figure 3 5 CAUTION D...

Страница 26: ...ing Unit MAJ 2305 1 Check the position of the brake pedal push it until it hits the back apply the brake and confirm that the surgical microscope is locked to the floor Figure 3 7 2 Confirm that the s...

Страница 27: ...ge may result NOTE The unit cover lock screws 2 are not separable from the unit cover even after they are loosened 4 Connect the Infrared Imaging Unit to the IR unit terminal marked IR at the top of t...

Страница 28: ...3 mm width across flats It will be required when detaching the imaging unit from the LED light source for servicing etc CAUTION When connecting an imaging unit to the LED light source be sure to conne...

Страница 29: ...ve reference information that the function indicated on it is incorporated Although the equipment functions normally without the emblem it is recommended to attach it to the LED light source when the...

Страница 30: ...tible video recorders Table 3 2 Compatible observation monitors Table 3 3 NOTE On the observation monitor othe than the observation monitors shown in the above table the IR playback function does not...

Страница 31: ...gical microscope and video recorder according to the instruction manual of the surgical microscope 2 Connect the surgical microscope and observation monitor according to the instruction manual of the...

Страница 32: ...of video recorder MAJ 2308 INSTRUCTION MANUAL Ch 3 Connecting diagram Figure 3 15 LMD X550ST HVO 4000ST HDMI output terminal HDMI input terminal RS 232C input terminal RS 232C output terminal RS 232C...

Страница 33: ...Set the area in which the image brightness is measured Refer to Setting the iris area on page 33 Iris sensitivity Set the brightness control speed Refer to Setting the iris sensitivity on page 35 IR b...

Страница 34: ...s by following the procedures described in Setting the scope switch Setting the foot switch and Setting the touch panel custom button in Section 4 3 Editing the user setup in the instruction manual fo...

Страница 35: ...ions set in the basic image adjustment window iris area and iris sensitivity are not only applied to the IR imaging mode and BL imaging mode but also to all imaging modes including the WLI mode Theref...

Страница 36: ...re 4 3 4 Confirm that the selected user name is shown in the user ID window Figure 4 4 5 Tap the Basic image adjustment button The available image adjustment function names are displayed below the Bas...

Страница 37: ...enter setting when the brightness of the observed region is inappropriate due to the part other than the image enter when it is too bright or dark Setting Description Full Measuring is applied to the...

Страница 38: ...ris area setting If you wish to set another item proceed to its setting instead of tapping the Save button Figure 4 8 4 Tap the Back button to finish the user presets If you wish to change other user...

Страница 39: ...cedure in Opening the basic image adjustment screen on page 31 Table 4 4 Setting Description High Changes in image brightness are tracked in a high speed Low Changes in image brightness are tracked in...

Страница 40: ...sensitivity setting If you wish to set another item proceed to its setting instead of tapping the Save button Figure 4 12 4 Tap the Back button to finish the user presets If you wish to change other u...

Страница 41: ...ging mode setting is displayed and can be set only when the infrared imaging unit MAJ 2304 is combined with the LED light source Opening the IR image adjustment screen Open the setting item screen for...

Страница 42: ...ck the connections by referring to Section 3 3 Connection of Infrared Imaging Unit MAJ 2304 Blue Light Imaging Unit MAJ 2305 The surgical microscope has not been turned ON correctly or the IR imaging...

Страница 43: ...rm the procedure in Opening the IR image adjustment screen on page 37 Table 4 5 NOTE Tapping the Minus or Plus button once varies the image brightness by one step Holding down the button continuously...

Страница 44: ...oise in image may become noticeable 3 Tap the Save button to finish the IR brightness setting If you wish to set another item proceed to its setting instead of tapping the Save button Figure 4 21 4 Ta...

Страница 45: ...41 MAJ 2308 INSTRUCTION MANUAL Ch 4 1 Tap the Dialog button for IR AGC MAX gain Figure 4 23 2 Tap the IR AGC MAX gain button to be selected Figure 4 24 3 Tap the Close button Figure 4 25 Dialog IR AG...

Страница 46: ...he Save button to finish the IR AGC MAX gain setting If you wish to set another item proceed to its setting instead of tapping the Save button Figure 4 27 6 Tap the Back button to finish the user pres...

Страница 47: ...ime increases the image brightness but this also degrades the image smoothness in observations of quickly moving regions Setting Description 1 field 2 field 4 field 6 field A larger value extends the...

Страница 48: ...exposure time setting If you wish to set another item proceed to its setting instead of tapping the Save button Figure 4 31 4 Tap the Back button to finish the user presets If you wish to change other...

Страница 49: ...ed to modes 1 to 3 and can be recalled quickly during a surgical operation The details of enhancement settings can be set by following the instructions in Setting the IR enhancement mode on page 46 Se...

Страница 50: ...button Figure 4 35 4 Tap the Back button to finish the user presets If you wish to change other user presets proceed to their settings instead of tapping the Back button Figure 4 36 Setting item Setti...

Страница 51: ...ode to be set Figure 4 37 2 Tap the Structure enhancement A B or Edge enhancement E button to select the function to be assigned and then tap the Minus or Plus button under Level to set the level of e...

Страница 52: ...the Save button to finish the IR enhancement setting If you wish to set another item proceed to its setting instead of tapping the Save button Figure 4 41 6 Tap the Back button to finish the user pres...

Страница 53: ...g mode setting is displayed and can be set only when the blue light imaging unit MAJ 2305 is combined with the LED light source Opening the BL image adjustment screen Open the setting item screen for...

Страница 54: ...ck the connections by referring to Section 3 3 Connection of Infrared Imaging Unit MAJ 2304 Blue Light Imaging Unit MAJ 2305 The surgical microscope has not been turned ON correctly or the BL imaging...

Страница 55: ...0 NOTE Tapping the Minus or Plus button once varies the image brightness by one step Holding down the button continuously changes the BL brightness Setting Description 8 to 8 Set one of the seventeen...

Страница 56: ...oise in image may become noticeable 3 Tap the Save button to finish the BL brightness setting If you wish to set another item proceed to its setting instead of tapping the Save button Figure 4 50 4 Ta...

Страница 57: ...53 MAJ 2308 INSTRUCTION MANUAL Ch 4 1 Tap the Dialog button for BL AGC MAX gain Figure 4 52 2 Tap the BL AGC MAX gain button to be selected Figure 4 53 3 Tap the Close button Figure 4 54 Dialog BL AG...

Страница 58: ...he Save button to finish the BL AGC MAX gain setting If you wish to set another item proceed to its setting instead of tapping the Save button Figure 4 56 6 Tap the Back button to finish the user pres...

Страница 59: ...re time increases the image brightness but this also degrades the image smoothness in observations of quickly moving regions Setting Description 1 field 2 field 4 field 6 field A larger value extends...

Страница 60: ...exposure time setting If you wish to set another item proceed to its setting instead of tapping the Save button Figure 4 60 4 Tap the Back button to finish the user presets If you wish to change other...

Страница 61: ...down the button continuously changes the BL color tone Setting item Setting Description BL red color tone 8 to 8 Select the tone of red from seventeen steps from 8 to 8 A larger value increases the le...

Страница 62: ...Save button to finish the adjust of the BL color tones setting If you wish to set another item proceed to its setting instead of tapping the Save button Figure 4 64 4 Tap the Back button to finish th...

Страница 63: ...ed to modes 1 to 3 and can be recalled quickly during a surgical operation The details of enhancement settings can be set by following the instructions in Setting the BL enhancement mode on page 60 Se...

Страница 64: ...utton Figure 4 68 4 Tap the Back button to finish the user presets If you wish to change other user presets proceed to their settings instead of tapping the Back button Figure 4 69 Setting item Settin...

Страница 65: ...ode to be set Figure 4 70 2 Tap the Structure enhancement A B or Edge enhancement E button to select the function to be assigned and then tap the Minus or Plus button under Level to set the level of e...

Страница 66: ...the Save button to finish the BL enhancement setting If you wish to set another item proceed to its setting instead of tapping the Save button Figure 4 74 6 Tap the Back button to finish the user pres...

Страница 67: ...ration of the possibility of use in imaging modes other than the IR BL imaging mode Even when ON is selected here the data display is not displayed in the following cases WLI mode Digital zoom ratio 1...

Страница 68: ...08 INSTRUCTION MANUAL Ch 4 2 Tap the User presets button Figure 4 77 3 Tap your User ID button Figure 4 78 4 Confirm that the selected user ID is displayed in the user ID window Figure 4 79 User prese...

Страница 69: ...tting items will appear below the Display preferences button Figure 4 80 6 Tap the Pull down button for Data display to switch and select the setting Figure 4 81 7 Confirm that the selected setting is...

Страница 70: ...set another item proceed to its setting instead of tapping the Save button Figure 4 83 9 Tap the Back button to finish the user presets If you wish to change other user presets proceed to their settin...

Страница 71: ...icroscope NOTE Restoration to the previous setting value is not available after resetting Table 4 17 4 4 Resetting the current user presets Function Setting IR brightness 0 IR AGC MAX gain 27 dB IR MA...

Страница 72: ...68 4 4 Resetting the current user presets MAJ 2308 INSTRUCTION MANUAL Ch 4...

Страница 73: ...function but there are also the injury risks of patient or operator The system may interfere with other ancillary equipment that uses Infrared rays such as the navigation system Be sure to check the p...

Страница 74: ...tches and buttons cannot be operated for a few seconds in which the observation mode is switched over In IR imaging mode and BL imaging mode it is not necessary to take white balance The image is mono...

Страница 75: ...y drop and damage it 5 2 Inspection of connection of the Infrared and Blue Light Filter Unit Confirm that both of the caution lines yellow of the lock screws 2 are invisible If the caution line yellow...

Страница 76: ...r selector knob to IR Figure 5 3 3 Confirm that the IR imaging mode is entered and the IR icons are displayed on the touch panel and observation monitor Figure 5 4 NOTE The image may be defocused at t...

Страница 77: ...8 INSTRUCTION MANUAL Ch 5 4 Set the filter selector knob to WLI Figure 5 5 5 Confirm that the imaging mode is switched and the IR icons on the touch panel and observation monitor are hidden Figure 5 6...

Страница 78: ...nfirm that the WLI image still image is displayed on the sub screen of the observation monitor during IR imaging 5 4 Inspection of IR playback function Confirm that the cables connected to the surgica...

Страница 79: ...be controlled equally from any of scope switches 1 to 3 foot switches 1 to 6 and custom buttons 1 and 2 on the touch panel For how to assign the custom switch for use in the control follow the instru...

Страница 80: ...witch to IR imaging mode again immediately after switching from IR imaging mode to WLI mode the WLI image still image may not be displayed Change the display position and size of the sub screen by set...

Страница 81: ...elector knob to IR The video recorder starts recording of the IR image Figure 5 12 NOTE The maximum recording time of the IR playback function is 15 minutes The recording stops automatically after 15...

Страница 82: ...page 30 5 Confirm that the IR playback image is displayed on the sub screen of the observation monitor Figure 5 16 NOTE Change the display position and size of the sub screen by setting the video reco...

Страница 83: ...TRUCTION MANUAL Ch 5 NOTE The sub screen disappears even when switching to another imaging mode 6 Tap the Pull down button for IR playback to select Stop Figure 5 17 7 Confirm that the sub screen on t...

Страница 84: ...blue light incident on the observation area including reflected blue light for an extended period If you have to view directly at the observation area for an extended period switch the imaging mode t...

Страница 85: ...surgical microscope AF cannot be operated in IR imaging and BL imaging If the character information display on the observation monitor is set to OFF the BL icon is not displayed on the monitor even w...

Страница 86: ...82 5 6 After inspection MAJ 2308 INSTRUCTION MANUAL Ch 5 Follow the instructions in Section 5 14 After inspection in the instruction manual for the surgical microscope 5 6 After inspection...

Страница 87: ...If this instrument continues to be used while an irregularity is suspected damage to the patient s health may result CAUTION The illumination lamp lights automatically when the LED light source and s...

Страница 88: ...imaging take the following measures by referring to Chapter 4 Function Setup Adjustment of IR image brightness Increase of IR AGC MAX gain setting Increase of IR exposure time If the image is still da...

Страница 89: ...ast cannot be changed during IR imaging mode For more details on the IR imaging contact Olympus 1 By referring to the instruction manuals for the LED light source and surgical microscope used in combi...

Страница 90: ...is switched If this happens re focus it as described in Section 6 10 Adjusting the focus in the instruction manual for the surgical microscope AF cannot be operated in IR imaging If the character inf...

Страница 91: ...knob to IR Figure 6 4 NOTE When operating the filter selector knob immediately after the operation of the microscope section the WLI image still image may be blurred 2 Tap the Observe button on the to...

Страница 92: ...observation monitor Figure 6 7 NOTE For the WLI image still image the image about 4 seconds before the filter selector knob operation is displayed Therefore if you switch to IR imaging mode again imme...

Страница 93: ...ng of the IR image Figure 6 9 NOTE The maximum recording time of the IR playback function is 15 minutes The recording stops automatically after 15 minutes 2 To stop IR image recording set the filter s...

Страница 94: ...switch on page 30 5 Observe the IR playback image displayed on the sub screen of the observation monitor Figure 6 13 NOTE The display position and size of the sub screen can be changed by setting the...

Страница 95: ...TION MANUAL Ch 6 NOTE The sub screen disappears even when switching to another imaging mode 6 When the observation of IR playback image is completed tap the Pull down button for IR playback to select...

Страница 96: ...during BL imaging immediately return to the WLI mode Otherwise the accurate observation may be impossible Blue illumination light in BL imaging mode is light with the strongest energy among visible li...

Страница 97: ...e changed during BL imaging mode For more details on the BL imaging contact Olympus 1 By referring to the instruction manuals for the LED light source and surgical microscope used in combination with...

Страница 98: ...ing the focus in the instruction manual for the surgical microscope AF cannot be operated in BL imaging If the character information display on the observation monitor screen is set to OFF the BL icon...

Страница 99: ...t attempt to clean any electrical connection part such as a connector or contact using moistened gauze Otherwise damage or corrosion may cause equipment failure Do not soak in water autoclave or gas s...

Страница 100: ...treatment equipment MRI radio equipment or cellular phones Damage to this instrument may result 3 Remove dust dirt and other stains on the surface by wiping with a piece of gauze moistened with 70 et...

Страница 101: ...ment and take proper measures by referring to Section 8 2 Troubleshooting guide If the problem still persists have the instrument repaired by referring to Section 8 3 Returning this instrument for rep...

Страница 102: ...imaging mode as described in Section 6 2 Operation of IR imaging mode or Section 6 4 Operation of BL imaging mode IR or BL imaging is impossible The LED light source was turned ON after the surgical...

Страница 103: ...g incident to the observed region The data display on IR or BL imaging is not displayed on the observation monitor The character information display is set to OFF Set the character information display...

Страница 104: ...longer in WLI mode switch to IR imaging mode WLI image still image is blurred during IR playback Operate the filter selector knob immediately after operating the microscope section Switch to IR imagin...

Страница 105: ...16 E117 E120 E121 E122 E136 E139 E142 E143 E219 Microscope error Irregularity in surgical microscope Follow the instructions in Chapter 10 Troubleshooting in the instruction manual for the surgical mi...

Страница 106: ...2305 The Blue Light Imaging Unit is connected to an extension terminal other than the BL imaging unit terminal of the LED light source Connect the Blue Light Imaging Unit to the LED light source as d...

Страница 107: ...ng in the instruction manuals for the surgical microscope and Chapter 7 Troubleshooting in the instruction manuals for LED light source E231 Light source error The connected LED light source is incomp...

Страница 108: ...d and Blue Light Filter Unit to WLI If the problem still persists turn OFF the surgical microscope and LED light source after use unplug the power supply plug of the surgical microscope from the hospi...

Страница 109: ...f combinations of equipment other than those shown below are used the full responsibility should be assumed by the medical treatment facility Such combinations do not only allow the equipment to manif...

Страница 110: ...B IMH 20 1 2 IMH 10 1 2 4K3D Video Recorder HVO 4000ST LCD Monitor LMD X550ST LMD X310ST LMD X550S 1 LMD X310S 1 LMD 3251ST 2 HIGH DEFINITION LCD MONITOR OEV262H 1 2 NARROW BAND IMAGING UNIT 3 MAJ 230...

Страница 111: ...2 15 4 psia Standard storage environment e g within the hospital Ambient temperature 5 40 C 41 104 F Relative humidity 10 95 without condensation Atmospheric pressure 700 1060 hPa 0 7 1 1 kgf cm2 10...

Страница 112: ...d Imaging Unit MAJ 2304 Blue Light Imaging Unit MAJ 2305 Recorder Remote Cable 3P MAJ 2310 Item Specifications Dimensions 58 W 66 H 28 D mm Weight 18 g Item Specifications Dimensions 31 W 25 H 17 D mm...

Страница 113: ...ctrical and Electronic Equipment this symbol indicates that the product must not be disposed of as unsorted municipal waste but should be collected separately Refer to your local Olympus distributor f...

Страница 114: ...its internal function Therefore its RF emissions are very low and are not likely to cause any interference in nearby electronic equipment Radiated emissions CISPR 11 Class B This instrument s RF emis...

Страница 115: ...typical commercial original condition feeding the facilities or hospital environment Surge IEC 61000 4 5 Differential mode 0 5 1 kV Common mode 0 5 1 2 kV Same as left Mains power quality should be t...

Страница 116: ...Immunity test IEC 60601 1 2 2014 test level Compliance level Electromagnetic environment Guidance Conducted RF IEC 61000 4 6 3V 150 kHz 80 MHz Same as left Refer to the guidance in the left column 6V...

Страница 117: ...470 FM 2 5 kHz deviation 1 kHz sine 2 As an alternative to FM modulation 50 pulse modulation at 18 Hz may be used because while it does not represent actual modulation it would be worst case 2 28 710...

Страница 118: ...ble Shield Length m Location Classification Test Included MAJ 2301 Foot Switch cable Yes 4 65 Rear panel SIP SOP Emission Immunity MAJ 2313 POWER CORD EU No 4 5 Rear panel AC Emission Immunity MAJ 230...

Страница 119: ...reproduced or distributed without the express written permission of OLYMPUS MEDICAL SYSTEMS CORP OLYMPUS is a registered trademark of OLYMPUS CORPORATION Trademarks product names logos or trade names...

Страница 120: ...alley Road 12 01 04 Valley Point Office Tower Singapore 248373 Fax 6834 2438 Telephone 6834 0010 A8F Ping An International Financial Center No 1 3 Xinyuan South Road Chaoyang District Beijing 100027 P...

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