Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recently issued accounting standards (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recently issued accounting standards (Details) - ASU 2016-02 - Forecast adjustment
¥ in Millions
Jan. 01, 2019
CNY (¥)
Recently issued accounting standards  
Right-of-use assets ¥ 3.5
Lease liabilities ¥ 3.0