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BANK AND OTHER BORROWINGS | 12 Months Ended
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Dec. 31, 2020
BANK AND OTHER BORROWINGS |
BANK AND OTHER BORROWINGS | 18. BANK AND OTHER BORROWINGS ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As at December 31,
​ | ​ | 2019 | ​ | 2020 | ​ | 2020
​ |  | RMB |  | RMB |  | US$
Total bank and other borrowings |  | 1,620,202 |  | 2,116,924 |  | 324,433
Comprised of: |  | ​ |  | ​ |  | ​
Short-term |  | 285,500 |  | 24,481 |  | 3,752
Long-term, current portion |  | 42,939 |  | 124,395 |  | 19,064
​ |  | 328,439 |  | 148,876 |  | 22,816
Long-term, non-current portion |  | 1,291,763 |  | 1,968,048 |  | 301,617
​ |  | 1,620,202 |  | 2,116,924 |  | 324,433
​ Certain bank borrowings are secured by equipment with a net carrying value of RMB119,359 and RMB414,326 (US$63,498) (note 9), accounts receivable with a carrying value of RMB30,524 and RMB33,686 (US$5,163) (note 6) (including lease receivables with a carrying value of RMB24,997 and RMB26,782 (US$ 4,105) (note 10), certain land use rights (which are recorded as “right-of-use assets”) with a carrying value of RMB416,548 and RMB414,470 (US$63,520) (note 10), certain long-term investments with a carrying value of nil and RMB 166,870 (US$25,574) (note 14), certain construction in progress with a carrying value of RMB1,152,379 and RMB 1,150,018 (US$176,248) (note 9), deposit for non-current asset with a carrying value of nil and nil (note 13),and restricted cash of RMB nil and nil (note 5), as of December 31, 2019 and 2020, respectively. The short-term bank and other borrowing bore a weighted average interest of 7.73 % and 7.01% per annum, and the long-term bank and other borrowings bore a weighted average interest of 11.49% and 7.11% per annum, respectively, as of December 31, 2019 and 2020. Bank and other borrowings amounted to RMB 39,014 (US$5,979) (2019: RMB41,624) and RMB 2,077,911 (US$318,454) (2019: RMB1,578,578) were denominated in US$ and RMB, respectively as of December 31, 2020. The maturity analysis of the long-term bank and other borrowings are as follows: ​
​ | ​ | ​ | ​ | ​
​ |  | RMB |  | US$
Within one year |  | 124,395 |  | 19,064
Between one and two years |  | 172,131 |  | 26,381
Between two and three years |  | 248,715 |  | 38,117
Between three and four years |  | 445,079 |  | 68,211
Above four years |  | 1,102,123 |  | 168,908
​ |  | 2,092,443 |  | 320,681
​ As of December 31, 2020, the Group had unutilized short-term bank credit lines and unutilized long-term bank credit lines amounted to RMB 1,710 (US$262) and RMB 406,656 (US$62,323), respectively.

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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI http://asc.fasb.org/topic&trid=2208564 + Details
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