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INCOME TAXES (Tables) | 12 Months Ended
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Dec. 31, 2024
INCOME TAXES |
Summary of income (loss) before income taxes | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years Ended December 31,
​ |  | 2022 |  | 2023 |  | 2024
PRC including Hong Kong and Taiwan | ​ | (483) | ​ | 5,833 | ​ | 5,414
Germany |  | (410) |  | (463) |  | (857)
Other |  | (713) |  | (21) |  | 248
Total |  | (1,606) |  | 5,349 |  | 4,805
Schedule of tax expense (benefit) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years Ended December 31,
​ |  | 2022 |  | 2023 |  | 2024
Current Tax |  | 475 |  | 1,175 |  | 1,549
Deferred Tax |  | (268) |  | 29 |  | 113
Total |  | 207 |  | 1,204 |  | 1,662
Schedule of a reconciliation between the effective income tax rate and PRC statutory income tax rate | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years Ended December 31, | ​
​ |  | 2022 |  | 2023 |  | 2024 | ​
PRC statutory tax rate |  | 25 | % | 25 | % | 25 | %
Tax effect of non-deductible expenses and non-taxable income in determining taxable profit |  | (8) | % | 2 | % | 4 | %
Effect of different tax rate of group entities operating in other jurisdictions |  | (10) | % | (4) | % | (2) | %
Effect of change in valuation allowance |  | (15) | % | (0) | % | 1 | %
Effect of tax holiday |  | 1 | % | (1) | % | (1) | %
Effect of cash dividends |  | (6) | % | 1 | % | 8 | %
Effective tax rate |  | (13) | % | 23 | % | 35 | %
Schedule of the aggregate amount and per share effect of the tax holidays | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years Ended December 31,
​ |  | 2022 |  | 2023 |  | 2024
Aggregate amount |  | 22 |  | 60 |  | 47
Per share effect—basic |  | 0.01 |  | 0.02 |  | 0.02
Per share effect—diluted |  | 0.01 |  | 0.02 |  | 0.02
Schedule of the principal components of the Group's deferred income tax assets and liabilities | ​
​ | ​ | ​ | ​ | ​
​ | ​ | As of December 31,
​ |  | 2023 |  | 2024
Deferred tax assets: |  |  |  |
Net loss carryforward |  | 1,289 |  | 1,091
Deferred revenue |  | 454 |  | 562
Long-term assets |  | 399 |  | 485
Bad debt provision |  | 80 |  | 80
Accrued payroll |  | (10) |  | 110
Other accrued expenses |  | 74 |  | (12)
Others |  | 231 |  | 133
Valuation allowance |  | (675) |  | (718)
Total deferred tax assets, net of valuation allowance |  | 1,842 |  | 1,731
Deferred tax liabilities: |  | ​ |  | ​
Fair value adjustment for building, land use rights and identified intangible assets due to acquisition |  | 1,593 |  | 1,400
Others |  | 51 |  | 5
Withholding tax | ​ | — | ​ | 191
Total deferred tax liabilities | ​ | 1,644 |  | 1,596
Net deferred tax assets | ​ | 198 | ​ | 135
Analysis as: | ​ | ​ | ​ | ​
Deferred tax assets | ​ | 1,043 | ​ | 1,054
Deferred tax liabilities | ​ | 845 | ​ | 919
Net deferred tax assets |  | 198 | ​ | 135
Summary of movement of the valuation allowance | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years Ended December 31,
​ |  | 2022 |  | 2023 |  | 2024
Balance at the beginning of the year | ​ | (466) | ​ | (731) | ​ | (675)
Provided |  | (338) |  | (145) |  | (271)
Reversed |  | 41 |  | 165 |  | 177
Written off |  | 32 |  | 36 |  | 51
Balance at the end of the year |  | (731) |  | (675) |  | (718)
Schedule of unrecognized tax benefits | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years Ended December 31,
​ |  | 2022 |  | 2023 |  | 2024
Balance at the beginning of the year |  | 60 |  | 65 |  | 67
Addition for tax positions |  | 5 |  | 2 |  | 18
Balance at the end of the year |  | 65 |  | 67 |  | 85

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