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Intangible assets, net | 12 Months Ended
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Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible assets, net | Note 9 — Intangible assets, net The Company’s intangible assets with definite useful lives primarily consist of copyrights, non-compete agreements and technology know-hows. The following table summarizes acquired intangible asset balances as of:
Schedule of intangible assets, net |  |  |  |  |  |  |  |  |  |  |  |
|  | December 31, 2023 |  |  | December 31, 2024 |  |  | December 31, 2024 |
|  | RMB |  |  | RMB |  |  | USD |
Non-compete agreements |  |  | 5,886,401 |  |  |  | - |  |  |  | - |
Subtotal |  |  | 5,886,401 |  |  |  | - |  |  |  | - |
Less: accumulated amortization |  |  | (5,886,401 | ) |  |  | - |  |  |  | - |
Intangible assets, net* |  |  | - |  |  |  | - |  |  |  | - |
| * | The Company performed annual impairment analysis as of December 31, 2023 and concluded the carrying value exceeds the fair value, which resulted in the nil balance of intangible assets, net.
Amortization expense for the years ended December 31, 2023 and 2024 amounted to RMB 5,886,401 and 0 nil, respectively.

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