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LEASES - Additional Information (Detail) - CNY (¥) ¥ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Leases [Abstract] |  |  |
Operating lease expenses | ¥ 35,738 | ¥ 24,255 | ¥ 22,886
Short-term leases expense | ¥ 6,511 |  |

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