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SHORT-TERM DEBT AND CURRENT PORTION OF LONG-TERM DEBT (Details) | Dec. 31, 2017 USD ($) | Dec. 31, 2017 CNY (¥) | Dec. 31, 2016 CNY (¥)
--- | --- | --- | ---
Short-term borrowings |  |  |
Other short-term debt |  |  | ¥ 48,157,745
Total | $ 2,507,766,699 | ¥ 16,316,282,473 | 6,887,309,589
Restricted cash | 268,785,090 | 1,748,796,431 | 1,744,490,307
Short-term investment | 4,323,492,324 | 28,129,938,110 | 14,112,862,288
2020 Notes |  |  |
Short-term borrowings |  |  |
Long-term debt, current maturities | 700,000,000 | 4,554,403,494 |
2018 Notes |  |  |
Short-term borrowings |  |  |
Long-term debt, current maturities |  | 3,076,419,373 |
2017 Notes |  |  |
Short-term borrowings |  |  |
Long-term debt, current maturities |  |  | 170,867,230
Loan facility |  |  |
Short-term borrowings |  |  |
Short-term bank borrowings |  | 8,685,459,606 | ¥ 6,668,284,614
Borrowing with an interest rate of 3.92% |  |  |
Short-term borrowings |  |  |
Short-term bank borrowings | $ 1,300,000,000 | 8,700,000,000 |
Bank deposits, current |  | 2,300,000,000 |
Restricted cash |  | 595,000,000 |
Short-term investment |  | ¥ 1,700,000,000 |
Weighted average interest rate | 3.92% | 3.92% |

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