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v3.25.2

Taxes (Details 1) | Jun. 30, 2025 USD ($) | Jun. 30, 2025 CNY (¥) | Dec. 31, 2024 CNY (¥)
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Deferred tax assets: |  |  |
Net operating loss carry forwards |  |  |
Allowance for doubtful accounts | 61,513 | 440,346 | 55,732
Less: valuation allowance |  |  |
Deferred tax assets, net | 61,513 | 440,346 | 55,732
Deferred tax liabilities: |  |  |
Recognition of intangible assets arising from business combinations |  |  |
Total deferred tax liabilities, net |  |  |

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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-2 + Details
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