Document and Entity Information Document Information [Table] Entity Addresses, Address Type [Axis] Address Type [Domain] Business Contact [Member] Business Contact Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] ADR [Member] American depositary shares Common Class B [Member] Class B Class B ordinary share Common Class A [Member] Class A Class A ordinary share Document Information [Line Items] Document and Entity Information Document Type Document Registration Statement Document Annual Report Document Transition Report Document Shell Company Report Document Period End Date Current Fiscal Year End Date Document Fiscal Year Focus Securities Act File Number Entity Registrant Name Entity Incorporation, State or Country Code Contact Personnel Name Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Three Entity Address, City or Town Entity Address, Postal Zip Code Entity Address, Country 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 Accounting Standard Entity Shell Company Entity Central Index Key Document Fiscal Period Focus Amendment Flag Auditor Name Auditor Location Auditor Firm ID Title of 12(b) Security Trading Symbol Security Exchange Name No Trading Symbol Flag Entity Common Stock, Shares Outstanding Contact Personnel Email Address Country Region City Area Code Local Phone Number CONSOLIDATED BALANCE SHEETS Statement [Table] Statement [Table] Statement [Line Items] Assets [Abstract] ASSETS Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Restricted Cash Restricted cash Short-Term Investments Short-term investments Total short-term investments Financing Receivable, after Allowance for Credit Loss, Current Notes receivable Accounts Receivable, after Allowance for Credit Loss, Current Ending Balance Opening Balance Accounts receivable, net (net of allowance of RMB 54,972 and RMB 79,952 as of December 31, 2024 and 2025, respectively) Total accounts receivable, net Contract with Customer, Asset, after Allowance for Credit Loss, Current Ending Balance Opening Balance Contract assets, net (net of allowance of RMB 9,901 and RMB 19,810 as of December 31, 2024 and 2025, respectively) Other Receivables, Net, Current Amounts due from related parties Other Receivable, after Allowance for Credit Loss, Current, Related Party [Extensible Enumeration] Inventory, Net Inventories Inventories Prepaid Expense and Other Assets, Current Prepayments and other current assets Total Assets, Current Total current assets Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale, including construction in progress. Property, Plant and Equipment, Net, Including Construction in Progress Property and equipment, net Total Intangible Assets, Net (Excluding Goodwill) Intangible assets, net Amount of land use rights. Land Use Rights, Net Land-use rights, net Long-Term Investments Long-term investments Total Long term investments Operating Lease, Right-of-Use Asset Operating lease right-of-use assets Other Assets, Noncurrent Other non-current assets Other non-current assets Assets, Noncurrent Total non-current assets Assets TOTAL ASSETS Liabilities and Equity [Abstract] LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities, Current [Abstract] Current liabilities: Debt, Current Total Short-term borrowings Sum of the carrying values as of the balance sheet date of the portions of long-term notes payable due within one year or the operating cycle if longer. Note Payable Current Notes payable Accounts Payable, Current Accounts payable Contract with Customer, Liability, Current Ending Balance Opening Balance Contract liabilities Other Liabilities, Current Amounts due to related parties Amounts due to related parties, net of allowance Other Liability, Current, Related Party [Extensible Enumeration] Product Warranty Accrual, Current Balance as of the end of the year Balance as of the beginning of the year Accrued warranty liability Accrued Income Taxes, Current Income tax payable Amount of expenses and other liabilities classified as current, incurred but not yet paid nor invoiced excluding product warranty accrual and accrued income taxes classified as current. Accrued Liabilities And Other Liabilities, Current Accrued expenses and other current liabilities Liabilities, Current Total current liabilities Operating Lease, Liability, Noncurrent Operating lease liabilities Long-term operating lease liabilities Long-Term Debt, Excluding Current Maturities Long-term bank borrowings Long-term borrowings Other Liabilities, Noncurrent Other non-current liabilities Liabilities, Noncurrent Total non-current liabilities Liabilities TOTAL LIABILITIES Commitments and Contingencies Commitments and contingencies (Note 26) Equity, Attributable to Parent [Abstract] Shareholders' equity Common Stock, Value, Issued Ordinary shares Additional Paid in Capital Additional paid-in capital Stockholders' Equity Note, Subscriptions Receivable Subscription receivables Subscription receivables Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income Retained Earnings (Accumulated Deficit) Accumulated deficit Equity, Attributable to Parent Balance as of ending Beginning balance Total shareholders' equity Total Shareholders' equity Liabilities and Equity TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY Accounts Receivable, Allowance for Credit Loss, Current Less: allowance for expected credit losses Allowance for accounts receivables Contract with Customer, Asset, Allowance for Credit Loss, Current Allowance for contract assets 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 OPERATIONS AND COMPREHENSIVE (LOSS) INCOME Revenue from Contract with Customer, Excluding Assessed Tax Net revenues Net revenues Cost of Revenue Cost of revenues Cost of revenues Gross Profit Gross Profit Operating Expenses [Abstract] Operating expenses: Selling and Marketing Expense Sales and marketing expenses Sales and marketing expenses General and Administrative Expense General and administrative expenses Research and Development Expense Research and development expenses Other Operating Income (Expense), Net Other operating income, net Total Operating Expenses Total operating expenses Operating Income (Loss) (Loss) income from operations Interest Income, Operating Interest income Interest Expense, Nonoperating Interest expenses Gain (Loss), Foreign Currency Transaction, before Tax Foreign exchange (loss) gain, net Foreign exchange (loss) gain Other Nonoperating Income (Expense) Other income, net Other income (loss), net Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Net (loss) income before income tax and share of loss in equity method investments Income Tax Expense (Benefit) Income tax expense Income tax expenses Income (Loss) from Equity Method Investments Share of loss in equity method investee Income from equity in earnings of subsidiaries Share of loss in equity method investment Equity in (deficit) earnings of subsidiaries Net (loss) income Net Income (Loss) Available to Common Stockholders, Basic Net (loss) income attributable to ordinary shareholders of the Company Net (loss) income attributable to ordinary shareholders of the Company Net (loss) income attributable to ordinary shareholders (LOSS) EARNINGS PER SHARE Net (loss) earnings per share: Earnings Per Share, Basic Basic (amounts per share) Basic net (loss) earnings per share attributable to ordinary shareholders Earnings Per Share, Diluted Diluted (amounts per share) Diluted net (loss) earnings per share attributable to ordinary shareholders Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Weighted average shares used in calculating net (loss) earnings per share: Denominator Weighted Average Number of Shares Outstanding, Basic Basic (in shares) Weighted average number of ordinary shares outstanding-basic (in shares) Weighted Average Number of Shares Outstanding, Diluted Diluted (in shares) Weighted average number of ordinary shares outstanding- diluted (in shares) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive income (loss), net of tax of nil: Comprehensive income, (loss), net of tax of nil: Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Foreign currency translation Foreign currency translation adjustments Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive (loss) income Comprehensive (loss) income Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Other comprehensive income (loss), tax Tax CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' (DEFICIT) EQUITY Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Ordinary shares Additional Paid-in Capital [Member] Additional paid-in capital Receivables from Stockholder [Member] Subscription receivables Retained Earnings [Member] Accumulated deficit AOCI Attributable to Parent [Member] Accumulated other comprehensive (loss) income Shares, Outstanding Balance as of ending (in shares) Beginning balance (in shares) APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Share-based compensation Stock Issued During Period, Value, New Issues Issuance of ordinary shares for initial public offering ("IPO") Stock Issued During Period, Shares, New Issues Number of shares issued Issuance of ordinary shares for initial public offering ("IPO") (in shares) Value of shares issued during the period to upon reclassification of temporary equity to permanent equity. Stock Issued During Period, Value, Reclassification From Temporary Equity To Permanent Equity Reclassification of redeemable shares to ordinary shares upon IPO Number of shares issued during the period upon reclassification of temporary equity to permanent equity. Stock Issued During Period, Shares, Reclassification From Temporary Equity To Permanent Equity Reclassification of redeemable shares to ordinary shares upon IPO (in shares) The value of shares issued during the period upon exercise of stock options and vesting of restricted stock units. Stock Issued During Period, Value, Stock Option Exercised And Vesting Of Restricted Share Units Issuance of ordinary shares upon the exercise of share options and vesting of restricted share units The number of shares issued during the period upon exercise of stock options and vesting of restricted stock units. Stock Issued During Period, Shares, Stock Option Exercised And Vesting Of Restricted Share Units Issuance of ordinary shares upon the exercise of share options and vesting of restricted share units (in shares) The amount of conversion of stock from one class to another class. Conversion Of Stock From One Class To Another Class Conversion of Class A Ordinary shares into Class B Ordinary shares Represents the conversion of stock from one class to another class. Conversion Of Shares From One Class To Another Class Conversion of Class A Ordinary shares into Class B Ordinary shares (in shares) The amount of settlement of subscription receivables in connection with reorganization. Settlement Of Subscription Receivables In Connection With Reorganization Settlement of subscription receivables in connection the 2021 reorganization Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Issuance cost CONSOLIDATED STATEMENTS OF CASH FLOWS Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net (loss) income to net cash provided by operating activities: Adjustments to reconcile net loss to net cash used in operating activities: Depreciation, Depletion and Amortization Depreciation and amortization Share-Based Payment Arrangement, Noncash Expense Share-based compensation Amount of provision for credit loss expense pertaining to accounts receivable, contract assets and financing receivables. Provision For (Reversal Of) Allowance For Credit Loss Provision for allowance for credit loss Gain (Loss) on Disposition of Property Plant Equipment Loss from disposal of property and equipment Amount of gain (loss) on sale or disposal of intellectual property. Gain Loss On Transfer Of Intellectual Property Gain from transfer of an intellectual property Amount of expense (income) related to adjustment to fair value of short term investments. Fair Value Adjustment of Short-term investments Fair value change of financial instruments Adjustments to reconcile net loss to net cash used in operating activities from foreign exchange loss (gain), net. Adjustment for Foreign Currency Transaction Gain (Loss), before Tax Foreign exchange (gain) loss, net Foreign exchange loss (gain), net The amount of non-cash lease expenses. Non-cash Lease Expenses Non-cash lease expenses Impairment, Long-Lived Asset, Held-for-Use Impairment of property and equipment Impairment provision for fixed assets Inventory Write-down Inventory write-down Gain (Loss) on Disposition of Business Gain from disposal of a subsidiary Equity Securities, FV-NI, Gain (Loss) Gain from disposal of equity securities Equity Method Investment, Other-than-Temporary Impairment Equity method investment, impairment Loss from disposal of one long-term investment Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Notes Receivable, Current Notes receivable Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Contract with Customer, Asset Contract assets Increase (Decrease) in Inventories Inventories Increase (Decrease) in Prepaid Expense and Other Assets Prepayments and other current assets Increase (Decrease) in Due from Related Parties, Current Amounts due from related parties Increase (Decrease) in Other Noncurrent Assets Other non-current assets Increase (Decrease) in Other Current Liabilities Amounts due to related parties Increase (Decrease) in Contract with Customer, Liability Contract liabilities Increase (Decrease) in Deferred Income Taxes Deferred tax liabilities Increase (Decrease) in Accounts Payable Accounts payable The increase (decrease) during the reporting period of obligations evidenced by formal promissory notes. Increase (Decrease) in Notes Payable Notes payable Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Accrued expenses and other current liabilities Increase (Decrease) in Operating Lease Liability Operating leases liabilities Increase (Decrease) in Other Noncurrent Liabilities Other non-current liabilities Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Payments to Acquire Short-Term Investments Purchases of short-term investments Proceeds from Maturities, Prepayments and Calls of Short-Term Investments Maturity of short-term investments Payments to Acquire Long-Term Investments Purchases of long-term investments Purchases of long-term investments