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SCHEDULE I-ADDITIONAL FINANCIAL INFORMATION OF PARENT COMPANY - CONDENSED STATEMENTS OF CASH FLOWS (Details) - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Operating activities:      
Net (loss) income $ (78,179) $ 63,569 $ (2,595,941)
Adjustment to reconcile net loss to net cash provided by (used in) operating activities:      
Share-based compensation 37,725 134,560 704,565
Changes in assets and liabilities:      
Accrued expenses and other current liabilities (88,473) (914,964) (2,175,269)
Accrued salary and benefits (201,368) (357,485) (2,831,392)
Other non-current liabilities   (73,319) (136,118)
Net cash used in operating activities (77,289) (286,786) (6,560,679)
Investing activities:      
Net cash provided by investing activities (45,142) 80,885 960,056
Financing activities:      
Repayment of convertible notes     (1,806,453)
Net cash (used in) provided by financing activities (489,683) 1,832,070 (1,957,236)
Net (decrease) increase in cash, cash equivalents and restricted cash (612,114) 1,626,169 (7,557,859)
Cash, cash equivalents, and restricted cash at beginning of year 4,159,290 2,476,571 9,785,131
Cash, cash equivalents, and restricted cash at end of year 3,586,784 4,159,290 2,476,571
Parent company | Reportable legal entities      
Operating activities:      
Net (loss) income (78,179) 63,569 (2,595,941)
Equity in (income) loss of subsidiaries, VIEs and VIEs' subsidiaries (275,408) (424,159) 1,215,959
Adjustment to reconcile net loss to net cash provided by (used in) operating activities:      
Share-based compensation 37,725 134,560 704,565
Amortization of issuance cost and debt discounts related to convertible notes     51,797
Changes in assets and liabilities:      
Accrued expenses and other current liabilities (35,784) (741,434) 292,842
Other receivables, deposits and other assets 1,670 1,692  
Accrued salary and benefits (80,000) (33,000) (138,975)
Other non-current liabilities   (35,783) (136,129)
Net cash used in operating activities (429,976) (1,034,555) (605,882)
Investing activities:      
Advances to subsidiaries and VIEs (2,136,760) (974,894) (4,819,580)
Repayment of advances to subsidiary 2,322,002 2,250,000 6,607,179
Net cash provided by investing activities 185,242 1,275,106 1,787,599
Financing activities:      
Repayment of convertible notes     (1,806,453)
Net cash (used in) provided by financing activities     (1,806,453)
Net (decrease) increase in cash, cash equivalents and restricted cash (244,734) 240,551 (624,736)
Cash, cash equivalents, and restricted cash at beginning of year 245,740 5,189 629,925
Cash, cash equivalents, and restricted cash at end of year $ 1,006 $ 245,740 $ 5,189