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Earnings(loss) per share (Details Narrative) - ¥ / shares
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Jan. 10, 2025
Jul. 25, 2023
Dec. 28, 2017
Dec. 18, 2014
Dec. 17, 2014
Statement [Line Items]                
Weighted average number of shares outstanding in the year 75,471,592,326 12,745,069,737 2,109,776,108          
Right to receive shares   60,000            
American Depository Share [member]                
Statement [Line Items]                
Common stock, receivable shares       60,000,000 480,000 48,000 16,000 4,000
Common stock, par value               ¥ 0.00005