Document and Entity Information Document Information [Table] Class of Stock [Axis] Class of Stock [Domain] ADR [Member] American depository shares Common Class A [Member] Class A ordinary shares Common Class B [Member] Class B ordinary shares Entity Addresses, Address Type [Axis] Address Type [Domain] Business Contact [Member] Business Contact Document Information [Line Items] Document Information Document Type Document Period End Date Document Registration Statement Document Annual Report Document Transition Report Document Shell Company Report Securities Act File Number Entity Registrant Name Entity Incorporation, State or Country Code Contact Personnel Name Country Region City Area Code Local Phone Number Contact Personnel Email Address Entity Address, Address Line One Entity Address, Address Line Two Entity Address, City or Town Entity Address, Postal Zip Code Entity Address, Country Title of 12(b) Security Trading Symbol No Trading Symbol Flag Security Exchange Name Entity Common Stock, Shares Outstanding Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Emerging Growth Company ICFR Auditor Attestation Flag Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction Document Accounting Standard Entity Shell Company Entity Central Index Key Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Amendment Flag Auditor Name Auditor Firm ID Auditor Location CONSOLIDATED BALANCE SHEETS Statement [Table] Statement [Line Items] Assets [Abstract] Assets ASSETS Assets, Current [Abstract] Current assets Cash and Cash Equivalent Cash and cash equivalents Amount of term deposits placed with bank with original maturities of less than or equal to one year. Term Deposits With Banks, Current Term deposits Restricted Cash, Current Restricted cash Short-Term Investments Short-term investments Accounts Receivable, after Allowance for Credit Loss, Current Accounts receivable, net Accounts receivable, net Inventory, Net Inventories Inventories Prepaid Expense and Other Assets, Current Prepayments and other current assets Prepayments and other current assets Prepayments and other current assets Assets, Current Total current assets Assets, Noncurrent [Abstract] Non-current assets Property, Plant and Equipment, Net Property, plant and equipment, net Property, plant and equipment, net Finite-Lived Intangible Assets, Net Intangible assets, net Intangible assets, net Operating Lease, Right-of-Use Asset Operating lease right-of-use assets Deferred Income Tax Assets, Net Deferred income tax assets Other Assets, Noncurrent Other non-current assets Other non-current assets Assets, Noncurrent Total non-current assets Assets Total assets Liabilities [Abstract] LIABILITIES Liabilities Liabilities, Current [Abstract] Current liabilities Short-Term Bank Loans and Notes Payable Short-term bank borrowings Short-term bank borrowings Notes Payable, Current Notes payable (including notes payable of VIE without recourse to the Company were RMB294,348,768 and RMB394,285,714 as of December 31, 2024 and 2025, respectively) Notes payable Accounts Payable, Current Accounts payable (including accounts payable of VIE without recourse to the Company of RMB856,557,922 and RMB670,748,944 as of December 31, 2024 and 2025, respectively) Accounts payable Accrued Income Taxes, Current Income taxes payable (including income taxes payable of VIE without recourse to the Company of RMB909,115 and RMB933,612 as of December 31, 2024 and 2025, respectively) Income taxes payable Carrying value as of the balance sheet date of advances from customers. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Advances from Customers, Current Advances from customers (including advances from customers of VIE without recourse to the Company of RMB32,623,364 and RMB174,904,222 as of December 31, 2024 and 2025, respectively) Advances from customers Contract with Customer, Liability, Current Deferred revenue-current (including deferred revenue-current of VIE without recourse to the Company of RMB50,247,103 and RMB75,148,049 as of December 31, 2024 and 2025, respectively) Deferred revenue-current Carrying value as of the balance sheet date of accrued expenses and other liabilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Accrued Expenses and Other Liabilities, Current Accrued expenses and other current liabilities (including accrued expenses and other current liabilities of VIE without recourse to the Company of RMB192,470,955 and RMB382,533,451 as of December 31, 2024 and 2025, respectively) Accrued expenses and other current liabilities Accrued expenses and other current liabilities Liabilities, Current Total current liabilities Liabilities, Noncurrent [Abstract] Non-current liabilities Contract with Customer, Liability, Noncurrent Deferred revenue-non-current (including deferred revenue non-current of VIE without recourse to the Company of RMB16,886,859 and RMB23,316,175 as of December 31, 2024 and 2025, respectively) Deferred revenue-non-current Deferred Income Tax Liabilities, Net Deferred income tax liabilities (including deferred income tax liabilities of VIE without recourse to the Company of RMB3,269,464 and RMB2,057,892 as of December 31, 2024 and 2025, respectively) Deferred income tax liabilities Operating Lease, Liability, Noncurrent Operating lease liabilities Operating lease liabilities-non-current Operating lease liabilities-non-current (including operating lease liabilities of VIE without recourse to the Company were RMB89,990 and RMB976,934 as of December 31, 2024 and 2025, respectively) Other Liabilities, Noncurrent Other non-current liabilities (including other non-current liabilities of VIE without recourse to the Company of RMB9,697,841 and RMB12,941,916 as of December 31, 2024 and 2025, respectively) Other non-current liabilities Other non-current liabilities Liabilities, Noncurrent Total non-current liabilities Liabilities Total current liabilities and total liabilities Total liabilities Commitments and Contingencies Commitments and contingencies Equity, Attributable to Parent [Abstract] SHAREHOLDERS' EQUITY: Shareholders' equity: Common Stock, Value, Issued Ordinary Shares Ordinary shares Additional Paid in Capital Additional paid-in capital Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Retained Earnings (Accumulated Deficit) Accumulated deficit Equity, Attributable to Parent Ending balance Beginning balance Total shareholders' equity Liabilities and Equity Total liabilities and shareholders' equity Consolidated Entities [Axis] Consolidated Entities [Domain] Variable Interest Entity, Primary Beneficiary [Member] VIE Common Stock, Par or Stated Value Per Share Ordinary shares, par value (in dollars per share) Common Stock, Shares Authorized Ordinary shares, authorized Common Stock, Shares, Issued Ordinary shares, issued Common Stock, Shares, Outstanding Ordinary shares, outstanding CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS Revenue from Contract with Customer, Excluding Assessed Tax Revenues Revenues Cost of Revenue Cost of revenues Cost of revenues Gross Profit Gross profit Operating Expenses [Abstract] Operating expenses: Selling and Marketing Expense Selling and marketing expenses Research and Development Expense Research and development expenses General and Administrative Expense General and administrative expenses (including allowance for doubtful accounts of RMB139,445,017 and RMB7,632,517 for the years ended December 31, 2023 and 2024, respectively, and a reversal of allowance of RMB5,870,581 for the year ended December 31, 2025) Operating Expenses Total operating expenses Total operating expenses Amount of government grants. Government Grants Government grants Operating Income (Loss) Operating loss Interest Expense, Nonoperating Interest expenses Investment Income, Interest Interest income Gain (Loss) on Investments Investment income Investment income Changes in fair value of investments Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Loss before income taxes Income Tax Expense (Benefit) Income tax benefit Income tax expense Total Net loss Net loss Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive loss: Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Foreign currency translation adjustment, net of nil income taxes Foreign currency translation adjustment, net of nil income taxes OCI, Debt Securities, Available-for-Sale, Gain (Loss), before Adjustment, after Tax Unrealized gain on available-for-sale securities, net income taxes of RMB3,080, nil and nil for the year 2023, 2024 and 2025, respectively Unrealized holding gains on available-for-sale security, net of income taxes Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Less: reclassification adjustment for gain on available-for-sale securities realized in net loss, net of RMB64,025, nil and nil income taxes for the year 2023, 2024 and 2025, respectively Reclassification adjustment for gains on available-for-sale securities realized in net loss, net income taxes Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive loss NET LOSS PER ORDINARY SHARE Net loss per ordinary share Earnings Per Share, Basic -Basic Earnings Per Share, Diluted -Diluted Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average number of ordinary shares and ordinary shares equivalents outstanding used in computing net loss per ordinary share Denominator: Weighted Average Number of Shares Outstanding, Basic -Basic Denominator for basic and diluted net loss per ordinary share Weighted Average Number of Shares Outstanding, Diluted -Diluted Denominator for diluted net loss per ordinary share Accounts Receivable, Credit Loss Expense (Reversal) Allowance for doubtful accounts Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax, Portion Attributable to Parent Foreign currency translation adjustment, income tax OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Unrealized gain on available for sale securities, income tax Unrealized holding gains on available-for-sale security, income taxes Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Reclassification adjustment for gain on available for sale securities realized in net income, income tax Reclassification adjustment for gains on available-for-sale securities realized in net income, income tax CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY Equity Components [Axis] Equity Component [Domain] Common Stock [Member] Ordinary shares Additional Paid-in Capital [Member] Additional paid-in capital AOCI Attributable to Parent [Member] Accumulated other comprehensive loss Retained Earnings [Member] Accumulated deficit Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (decrease) in shareholders' deficit Shares, Outstanding Ending balance (in shares) Beginning balance (in shares) APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Share-based compensation (Note 13) APIC, Share-Based Payment Arrangement, Recognition and Exercise Exercise of share-based awards Number of shares of increase (decrease) to additional paid-in capital (APIC) for recognition and exercise of award under share-based payment arrangement. APIC, Share-based Payment Arrangement, Recognition and Exercise, Shares Exercise of share-based awards (in shares) CONSOLIDATED STATEMENTS OF CASH FLOWS Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Operating activities: Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net loss Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Adjustments to reconcile net loss to net cash provided by operating activities: Amount of additions charged to bad debt expense and write-off of bad debt allowance. Allowance for doubtful accounts, Additions to Expense and Write-off of Allowance Allowance for doubtful accounts Share-Based Payment Arrangement, Noncash Expense Share-based compensation (Note 13) Depreciation, Depletion and Amortization Depreciation and amortization Operating Lease, Impairment Loss Reduction in the carrying amount of right-of-use assets Unrealized Gain (Loss), Foreign Currency Transaction, before Tax Unrealized foreign exchange gain Deferred Income Tax Expense (Benefit) Deferred income tax benefit Total Deferred income tax benefit Gain (Loss) on Disposition of Property Plant Equipment Loss on disposal of property, plant and equipment Inventory Write-down Write-downs of inventories (Note 4) Write-down of inventories Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Inventories Inventories Increase (Decrease) in Prepaid Expense and Other Assets Prepayments and other current assets Increase (Decrease) in Other Noncurrent Assets Other non-current assets Increase (Decrease) in Accounts Payable Accounts payable and notes payable The increase (decrease) during the reporting period for advances from customers. Increase (Decrease) in Advances from Customers Advances from customers Increase (Decrease) in Contract with Customer, Liability Deferred revenue Increase (Decrease) in Other Noncurrent Liabilities Other non-current liabilities Increase (Decrease) in Income Taxes Receivable Income tax receivable Increase (Decrease) in Income Taxes Payable Income taxes payable Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Accrued expenses and other current liabilities No definition. Increase Decrease In Operating Leases Liabilities Operating lease liabilities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Net cash provided by operating activities Net cash provided by operating activities Net cash provided by (used in) operating activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Investing activities: Payments to Acquire Property, Plant, and Equipment Cash paid for purchase of property, plant and equipment The cash outflow for acquisition of term deposits. Payments to Acquire Term Deposits Cash paid for purchase of term deposits Amount of cash inflow from the sale or maturity redemption of term deposits. Proceeds From Maturity Redemption Of Term Deposits Cash received from redemption of term deposits Payments to Acquire Short-Term Investments Cash paid for purchase of short-term investments Proceeds from Sale of Short-Term Investments Cash received from sale of short-term investments Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Net cash provided by (used in) investing activities Net cash provided by (used in) investing activities Net cash provided by (used in) investing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Financing activities: Proceeds from Stock Options Exercised Cash received from exercise of employee stock options Proceeds from Bank Debt Proceeds from short-term bank borrowings Repayments of Bank Debt Repayment for short-term bank borrowings Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Net cash (used in) provided by financing activities Net cash (used in) provided by financing activities Net cash provided by financing activities Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Effect of foreign currency exchange rate changes on cash, cash equivalents and restricted cash Effect of foreign currency exchange rate changes on cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Net increase (decrease) in cash, cash equivalents and restricted cash Net increase (decrease) in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Cash, cash equivalents and restricted cash at the end of the year Cash, cash equivalents and restricted cash at the beginning of the year Total cash, cash equivalents and restricted cash Supplemental Cash Flow Information [Abstract] Supplemental information Interest Paid, Excluding Capitalized Interest, Operating Activity Interest paid Income Taxes Paid, Net Income tax paid Capital Expenditures Incurred but Not yet Paid Construction payable No definition available. DESCRIPTION OF ORGANIZATION AND PRINCIPAL ACTIVITIES