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ACCRUED EXPENSES AND OTHER LIABILITIES (Tables) | 12 Months Ended
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Dec. 31, 2025
ACCRUED EXPENSES AND OTHER LIABILITIES |
Schedule of accrued expenses and other liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As at December 31,
​ | ​ | 2024 | ​ | 2025 | ​ | 2025
​ | ​ ​ ​ | RMB | ​ ​ ​ | RMB | ​ ​ ​ | US$
Accrued expenses* |  | 547,626 |  | 461,212 | ​ | 65,952
Salaries and welfare payable |  | 83,003 |  | 107,053 | ​ | 15,308
Business and other taxes payable |  | 32,708 |  | 30,277 | ​ | 4,330
Contractual liabilities |  | 46,151 |  | 95,698 | ​ | 13,685
Other payables |  | 136,706 |  | 110,324 | ​ | 15,776
​ |  | 846,194 |  | 804,564 | ​ | 115,051
| * | As of December 31, 2024 and 2025, accrued expenses mainly consisted of payables for property, plant and equipment, accrued interest expense for bank and other borrowings and other accrued expenses. The decrease in 2025 was mainly due to the decrease in accrued interest expense for bank and other borrowings and other accrued expenses.

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- Definition Tabular disclosure of the components of accrued liabilities. + References No definition available. + Details
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