v3.26.1
Summary of significant accounting policies (Details Narrative)
12 Months Ended
Dec. 31, 2025
USD ($)
$ / shares
shares
Dec. 31, 2025
CNY (¥)
¥ / shares
shares
Dec. 31, 2024
CNY (¥)
¥ / shares
shares
Dec. 31, 2023
CNY (¥)
¥ / shares
Dec. 31, 2025
CNY (¥)
Accumulated other comprehensive income $ 14,207,228   ¥ 49,708,261   ¥ 99,859,762
Prepaid services fees 396,965   22,149   2,790,191
Allowance for other receivables and prepaid expenses 969,542   4,875,364   6,814,716
Impairment loss 156,938   1,102,938   1,103,089
Impairment Of Long Lived Assets | ¥       ¥ 6,602,198  
Deferred revenues 1,013,133   3,409,718   ¥ 7,121,109
Government subsidies 14,329 ¥ 100,717 7,037    
Other income 66,844 469,838 47,655 (1,127,156)  
Total expenses $ 222,779 ¥ 1,565,867 ¥ 1,515,078 ¥ 1,683,474  
[custom:DilutiveShares] | shares 7,659,818 7,659,818 9,664,959    
Earnings Per Share, Diluted | (per share) $ 2.12 ¥ 14.87 ¥ 3.99 [1] ¥ (11,758.59) [1]  
Shanghai Weimu [Member]          
Subsidiary, Ownership Percentage, Parent 42.00%       42.00%
Viwo Tech [Member]          
Subsidiary, Ownership Percentage, Parent 45.00%       45.00%
Year End Translation Rates [Member] | China, Yuan Renminbi          
Foreign Currency Transactions, Description 7.0288 7.0288 7.1884    
Average Translation Rates [Member] | China, Yuan Renminbi          
Foreign Currency Transactions, Description 7.1429 7.1429 7.1217 7.0467  
[1] Number of shares has been retrospectively adjusted for the share consolidation (10 to 1, 20 to 1, and 30 to 1) effective March 22, 2024, December 13, 2024 and July 16, 2025.