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Warrants (Tables) | 6 Months Ended
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Jun. 30, 2025
Guarantees and Product Warranties [Abstract] |
Schedule of Black-Scholes model |
Schedule of Black-Scholes model |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | December 31, 2024 |  |  | December 31, 2024 |  |  | June 30, 2025 |  |  | June 30, 2025 |
|  | USD |  |  | RMB |  |  | USD |  |  | RMB |
Input |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share price |  |  | 3.76 |  |  |  | 27.03 |  |  |  | 15.27 |  |  |  | 109.31 |
Risk-free interest rate |  |  | 4.26 | % |  |  | 4.26 | % |  |  | 3.96 | % |  |  | 3.96 | %
Volatility |  |  | 59.50 | % |  |  | 59.50 | % |  |  | 58.70 | % |  |  | 58.70 | %
Exercise price |  |  | 2,300.00 |  |  |  | 16,533.32 |  |  |  | 69,000.00 |  |  |  | 495,999.60 |
Warrant life (yr) |  |  | 2.92 |  |  |  | 2.92 |  |  |  | 2.42 |  |  |  | 2.42 |

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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