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OTHER NON-CURRENT ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2020
OTHER NON-CURRENT ASSETS |
Schedule of Other Non-Current Assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As at December 31,
​ |  | 2019 |  | 2020 |  | 2020
​ |  | RMB |  | RMB |  | US$
Deposit-long-term* |  | 6,733 |  | 6,036 |  | 925
Long-term deferred assets | ​ | 1,755 | ​ | — | ​ | —
Advance to hospitals-noncurrent** | ​ | 1,433 | ​ | 1,102 | ​ | 169
​ |  | 9,921 |  | 7,138 |  | 1,094
* Impairment losses of RMB400 and nil were provided for the balances as at December 31, 2019 and 2020. ** Impairment losses of RMB330 and RMB52 (US$8) were provided for the balances as at December 31, 2019 and 2020.

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- Definition Tabular disclosure of noncurrent assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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