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REVENUE (Details) ¥ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2017 CNY (¥) customer | Sep. 30, 2016 CNY (¥) customer
Net revenue |  |
Service revenue | ¥ 1,098,197 | ¥ 703,284
Equipment sales | 12,493 | 41,007
Net revenue | ¥ 1,110,690 | ¥ 744,291
Revenue | Customer concentration |  |
Net revenue |  |
Number of customers generated over 10% of the Company's total revenues | customer | 2 | 3
Revenue | Customer concentration | Customer One |  |
Net revenue |  |
Net revenue | ¥ 256,373 | ¥ 114,715
Revenue | Customer concentration | Customer Two |  |
Net revenue |  |
Net revenue | ¥ 113,669 | 105,909
Revenue | Customer concentration | Customer Three |  |
Net revenue |  |
Net revenue |  | ¥ 72,626

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