PREPAYMENTS AND OTHER CURRENT ASSETS (Narrative) (Details) ¥ in Thousands, $ in Thousands |
Dec. 31, 2017
CNY (¥)
|
Dec. 31, 2017
USD ($)
|
Dec. 31, 2016
CNY (¥)
|
Dec. 31, 2016
USD ($)
|
|---|---|---|---|---|
| Prepaid Expenses And Other Current Assets [Line Items] | ||||
| Reserve For Unrecoverable Deposits Current | ¥ 4,798 | $ 737 | ¥ 4,798 | |
| Due from Related Parties, Current | 25,304 | 3,889 | 13,496 | |
| JYADK [Member] | ||||
| Prepaid Expenses And Other Current Assets [Line Items] | ||||
| Due from Related Parties, Current | 13,658 | 1,967 | 13,658 | |
| Interest Receivable, Current | ¥ 221 | $ 34 | ¥ 370 | $ 53 |