INTANGIBLE ASSETS, NET (Schedule of Estimated Annual Amortization Expenses) (Details) - Dec. 31, 2017
¥ in Thousands, $ in Thousands
CNY (¥)
USD ($)
2018 ¥ 2,438 $ 375
2019 1,288 198
2020 923 142
2021 923 142
2022 ¥ 264 $ 41