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SHORT-TERM COMMERCIAL PAPER (Details) ¥ in Thousands, $ in Thousands |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Sep. 23, 2016 CNY (¥) | Sep. 23, 2016 USD ($) | Sep. 05, 2016 CNY (¥) | Sep. 05, 2016 USD ($) | Dec. 31, 2016 CNY (¥) | Dec. 31, 2016 USD ($) | Sep. 23, 2016 USD ($) | Sep. 05, 2016 USD ($)
SHORT-TERM COMMERCIAL PAPER |  |  |  |  |  |  |  |
Net proceeds from issuance of commercial paper |  |  |  |  |  | $ 134,311 |  |
Commercial paper maturing on September 2017 |  |  |  |  |  |  |  |
SHORT-TERM COMMERCIAL PAPER |  |  |  |  |  |  |  |
Face amount |  |  | ¥ 400,000 |  |  |  |  | $ 60,000
Fixed interest rate (as a percent) |  |  | 5.50% |  |  |  |  | 5.50%
Debt term |  |  | 1 year | 1 year |  |  |  |
Net proceeds from issuance of commercial paper |  |  | ¥ 398,400 | $ 59,900 |  |  |  |
Amortization of financing costs |  |  |  |  | ¥ 508 | 73 |  |
Commercial paper maturing on June 2017 |  |  |  |  |  |  |  |
SHORT-TERM COMMERCIAL PAPER |  |  |  |  |  |  |  |
Face amount | ¥ 500,000 |  |  |  |  |  | $ 74,800 |
Fixed interest rate (as a percent) | 5.30% |  |  |  |  |  | 5.30% |
Debt term | 9 months | 9 months |  |  |  |  |  |
Net proceeds from issuance of commercial paper | ¥ 498,500 | $ 74,700 |  |  |  |  |  |
Amortization of financing costs |  |  |  |  | 539 | 78 |  |
Other payables | Commercial paper maturing on September 2017 |  |  |  |  |  |  |  |
SHORT-TERM COMMERCIAL PAPER |  |  |  |  |  |  |  |
Interest expense |  |  |  |  | 6,992 | 1,008 |  |
Other payables | Commercial paper maturing on June 2017 |  |  |  |  |  |  |  |
SHORT-TERM COMMERCIAL PAPER |  |  |  |  |  |  |  |
Interest expense |  |  |  |  | ¥ 7,042 | $ 1,015 |  |

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