v3.26.1
Condensed Financial Information of the Parent Company (Tables) - Parent [Member]
 12 Months Ended
Dec. 31, 2025
Condensed Financial Information of the Parent Company (Tables) [Line Items]  
Schedule of Condensed Balance Sheets
   As of December 31, 
   2024   2025   2025 
   RMB   RMB   US$ 
ASSETS            
Cash and cash equivalents   54,971    128,663    18,399 
Other receivables, net   —    57,693,075    8,250,000 
Amount due from related parties   —    46,364,252    6,630,000 
Advances to suppliers   —    —　    —　 
Long-term Investment   —    993,020    142,000 
Total assets   54,971    105,179,010    15,040,399 
                
LIABILITIES AND SHAREHOLDERS’ EQUITY               
Accrued liabilities   —    349,655    50,000 
Amount due to a related party   437,958    —    — 
Total current liabilities   437,958    349,655    50,000 
Non-current liabilities               
Loss in excess of investment in subsidiaries, VIE and VIE’s subsidiaries   667,987,375    558,809,528    79,908,701 
Total non-current liabilities   667,987,375    558,809,528    79,908,701 
Total liabilities   668,425,333    559,159,183    79,958,701 
                
Commitments and contingencies   —    —    — 
Mezzanine equity               
Convertible redeemable preferred shares   1,595,051,558    —    — 
Shareholders’ deficit:               
Class A Ordinary shares (US$0.0001 par value; 450,000,000 shares authorized, 4,268,156 and 21,140,922 shares issued and outstanding as of December 31, 2024 and 2025, respectively)
   2,988    14,997    2,145 
Class B Ordinary shares (US$0.0001 par value; 2,042,042 shares authorized and outstanding as of December 31, 2024 and 2025, respectively)
   1,408    1,408    201 
Subscription receivable   (1,608)   (2,186)   (313)
Additional paid-in capital   —    2,023,765,569    289,394,627 
Accumulated deficit   (2,263,419,477)   (2,475,998,594)   (354,063,090)
Accumulated other comprehensive loss   (5,231)   (1,761,367)   (251,872)
Total deficit   (2,263,421,920)   (453,980,173)   (64,918,302)
Total liabilities, mezzanine equity and deficit   54,971    105,179,010    15,040,399 
Schedule of Condensed Statements of Operations and Comprehensive Loss
   Years ended December 31, 
   2023   2024   2025   2025 
   RMB   RMB   RMB   US$ 
Operating costs and expenses:                
Selling, general and administrative   —    (377,756)   (49,347,867)   (7,056,651)
              　    　 
Operating loss                    
Equity loss in subsidiaries, VIEs and VIEs’ subsidiaries   (36,950,478)   (37,013,556)   (81,582,534)   (11,666,147)
Net loss   (36,950,478)   (37,391,312)   (130,930,401)   (18,722,798)
Accretion to redemption value of mezzanine equities   (108,440,354)   (105,969,614)   (81,648,716)   (11,675,611)
Net loss attributable to ordinary shareholders   (145,390,832)   (143,360,926)   (212,579,117)   (30,398,409)
              　    　 
Other comprehensive income                    
Foreign currency translation adjustments   —    (5,231)   (1,747,229)   (249,850)
Total other comprehensive loss   —    (5,231)   (1,747,229)   (249,850)
Total Comprehensive loss   (145,390,832)   (143,366,157)   (214,326,346)   (30,648,259)
Schedule of Condensed Statements of Cash Flows
   Year ended December 31, 
   2023   2024   2025   2025 
   RMB   RMB   RMB   US$ 
Cash flows from operating activities:                
Net loss   (36,950,478)   (37,391,312)   (130,930,401)   (18,722,798)
Adjustments to reconcile net loss to net cash used in operating activities:             　    　 
Equity loss in subsidiaries, VIEs and VIEs’ subsidiaries   36,950,478    37,013,556    81,582,534    11,666,147 
Share base payment   —    —    16,423,683    2,348,555 
Changes in operating liabilities:             　    　 
Other receivables   —    —    (57,693,075)   (8,250,000)
Amount due from a related party   35,500    402,458    (46,364,252)   (6,630,000)
Accrued liabilities             349,655    50,000 
Amount due to a related party   —    —    (437,958)   (62,626)
Net cash provided by operating activities   35,500    24,702    (137,069,814)   (19,600,722)
                     
Cash flows from investing activities:                    
Payment for investment in a subsidiary   —    —    (993,020)   (142,000)
Net cash used in investing activities   —    —    (993,020)   (142,000)
                     
Cash flows from financing activities:                    
Net proceeds from IPO   —    —    163,932,614    23,442,051 
Payment for deferred offering cost   —    —    (23,876,547)   (3,414,300)
Net cash provided by financing activities   —    —    140,056,067    20,027,751 
                     
Effect of exchange rate change   —    (5,231)   (1,919,541)   (274,491)
Net increase in cash and cash equivalents   35,500    19,471    73,692    10,538 
Cash and cash equivalents at beginning of the years   —    35,500    54,971    7,861 
Cash and cash equivalents at end of the years   35,500    54,971    128,663    18,399