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OTHER LONG-TERM LIABILITIES (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
OTHER LONG-TERM LIABILITIES |
Schedule of other long-term liabilities | ​
​ | ​ | ​ | ​ | ​
​ | ​ | As of December 31,
​ |  | 2019 |  | 2020
​ |  |  |  |
Consideration payable for acquisitions | ​ | 23,062 | ​ | 97,457
Payables for purchase of property and equipment |  | 231,459 |  | 139,162
Deferred revenue - non-current (Note 4) |  | 15,419 |  | 14,871
Deferred government grants |  | 6,507 |  | 6,196
Interest rate swap contracts (Note 16) | ​ | 10,408 | ​ | —
Asset retirement obligations | ​ | 52,441 | ​ | 76,909
Others |  | 6,241 |  | 14,662
Total |  | 345,537 |  | 349,257

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