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PRINCIPAL ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2025
PRINCIPAL ACCOUNTING POLICIES |
Schedule of estimated useful lives | ​
Leasehold improvements | ​ ​ ​ | Shorter of respective lease term or estimated useful life
​ | ​ | ​
Computer and equipment | ​ | 26 months to 4 years
| ​ | ​
Software | ​ | 5 years
| ​ | ​
Office furniture and fixtures | ​ | 3 years
| ​ | ​
Motor vehicles | ​ | 5 years
| ​ | ​
Office buildings | ​ | 10 to 20 years

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