OTHER INVESTMENTS (Details) - USD ($)	3 Months Ended	12 Months Ended
Mar. 31, 2021	Dec. 31, 2020
OTHER INVESTMENTS
As of beginning of the year	$ 281,668	$ 12,215
Acquisition of business under common control	0	147,882
Addition during the year	296,025	108,631
Disposal during the year	0	(34,923)
Fair value gain	8,264	38,742
Foreign exchange translation	(14,348)	9,121
As of end of the year	$ 571,609	$ 281,668

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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