This element represents the aggregate cost of investments accounted for under the equity method of accounting.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Amount of realized and unrealized gain (loss) on investment.

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The cash outflow for securities or other assets acquired, which qualify for treatment as an investing activity and are to be liquidated, if necessary, beyond the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the long-term.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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LONG TERM INVESTMENTS - Equity method investments (Details)	1 Months Ended	10 Months Ended	12 Months Ended
	Apr. 30, 2021 USD ($)	Oct. 26, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	May 31, 2020 USD ($)	May 31, 2020 HKD ($)
Schedule Of Equity Method Investments [Line Items]
Equity method investments			$ 369,567	$ 424,333
Payment for longterm investments			2,450,736		$ 600,000
Ocean Joy Holdings Limited ("Ocean Joy")
Schedule Of Equity Method Investments [Line Items]
Equity method investments				424,333
Investment amount						$ 462,276	$ 3,600,000
Percentage of ownership investment		70.00%				30.00%	30.00%
Investment gain (loss)		$ (39,141)		$ (40,625)
TradeUP Global Sponsor LLC ("Global Sponsor")
Schedule Of Equity Method Investments [Line Items]
Equity method investments			369,567
Percentage of ownership investment	20.00%
Investment gain (loss)			$ (84,993)
Payment for longterm investments	$ 454,560