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PREPAID AND OTHER CURRENT ASSETS, NET (Summary of Receivable Transferred and Consideration Allocated Based on Management's Estimation on Recoverability) (Details) - CNY (¥) ¥ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2012
Consideration allocated |  |  |
Payable to Zhenjiang Foreign Language School | ¥ 36,770 | ¥ 36,770 |
Allowance for Doubtful Accounts Receivable, Write-offs | 2,587 | ¥ 150,886 | ¥ 46,829
Xihua Group [Member] |  |  |
Consideration allocated |  |  |
Proceeds from Collection of Other Receivables | ¥ 20,000 |  |

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