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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2022
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Summary of estimated useful lives of property, equipment and software | ​
​ | ​ | ​
Category |  | Estimated Useful Life
Machinery and laboratory equipment | ​ | 5 years
Vehicles | ​ | 4 years
Furniture and tools | ​ | 3 - 5 years
Electronic equipment | ​ | 3 years
Computer software | ​ | 3 - 5 years
Leasehold improvements | ​ | Lesser of lease terms or estimated useful lives of the assets
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