Summary of Significant Accounting Policies - Summary of Cash and Cash Equivalents, Excluding Cash on Hand are Deposited in Financial Institutions at Locations (Details) - USD ($)	Dec. 31, 2025	Dec. 31, 2024
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents balances held at financial institutions	$ 11,385,381	$ 26,773,902
Total cash and cash equivalents balances held at financial institutions	11,384,597	26,773,136
People's Republic of China (PRC)
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents balances held at financial institutions	3,409,619	14,872,259
People's Republic of China (PRC) \| RMB
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents balances held at financial institutions	1,827,969	11,977,938
People's Republic of China (PRC) \| USD
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents balances held at financial institutions	6,141,320	9,018,804
People's Republic of China (PRC) \| EUR
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents balances held at financial institutions	1,574,250	1,776,869
Germany
Cash and Cash Equivalents [Line Items]
Cash balances held at financial institutions	1,833,658	2,882,073
Germany \| EUR
Cash and Cash Equivalents [Line Items]
Cash balances held at financial institutions	1,833,658	2,882,073
USA
Cash and Cash Equivalents [Line Items]
Cash balances held at financial institutions	6,141,320	9,018,804
USA \| USD
Cash and Cash Equivalents [Line Items]
Cash balances held at financial institutions	$ 7,400	$ 1,117,452

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

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For banks and other depository institutions: Includes cash on hand (currency and coin), cash items in process of collection, noninterest bearing deposits due from other financial institutions (including corporate credit unions), and noninterest bearing balances with the Federal Reserve Banks, Federal Home Loan Banks and central banks.

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