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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Foreign Currency Translation (Details) - ¥ / $
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES      
At end of the period - RMB 6.9668 6.8778 6.5075
Average rate for the period ended - RMB 6.9072 6.6187 6.7588