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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Foreign Currency Translation (Details)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Foreign Currency Translation [Abstract]      
Period end USD: RMB exchange rate 6.3726 6.5250 6.9618
Average USD: RMB exchange rate 6.4508 6.9042 6.9081