Unaudited Condensed Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Statement of Cash Flows [Abstract]
Net cash used in operating activities	$ (959,800)	$ (3,413,300)
Investing activities:
Investment in equity investees	(850,000)
Net cash used in investing activities	(850,000)
Financing activities:
Proceeds from issuance of common stocks pursuant to private placements	1,305,000
Capital injection from non-controlling shareholders	88,900
Net cash provided by financing activities	1,393,900
Net increase (decrease) in cash and cash equivalents	(415,900)	(3,413,300)
Cash, cash equivalents, beginning of period	7,263,600	7,380,700
Cash, cash equivalents, end of period	6,847,700	3,967,400
Supplemental Cash Flow Information
Payment of interest expenses		120,000
Payment of income tax expenses
Non-cash Investing and Financing activities
Collection of USDC from subscription fee from investors	50,000
Investment in equity investees in USDC	300,000
Issuance of common stocks to settle advance from subscription fee from investors	$ 6,539,000