Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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RELATED PARTY BALANCES AND TRANSACTIONS - Transactions with related parties (Parenthetical) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2021
Alphalion Group Limited
RELATED PARTY BALANCES AND TRANSACTIONS
Gain from sale of a Group's subsidiary	$ 617,500
Alphalion Group Limited \| IT Service Fees
RELATED PARTY BALANCES AND TRANSACTIONS
Consideration for sale	$ 106,105
Xiaomi Corporation and its affiliates \| Convertible Bonds
RELATED PARTY BALANCES AND TRANSACTIONS
Effective interest rate		5.40%