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v3.25.3

Summary of Significant Accounting Policies (Details) | 6 Months Ended | 12 Months Ended |
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Jun. 30, 2025 CNY (¥) Segment | Jun. 30, 2025 USD ($) Segment | Jun. 30, 2024 CNY (¥) | Dec. 31, 2024 CNY (¥) | Jun. 30, 2025 USD ($)
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Contract liabilities (in Yuan Renminbi) | ¥ 6,070,210 |  | ¥ 86,731,977 |  |
Reportable segment (in Segment) | Segment | 1 | 1 |  |  |
Net loss (in Yuan Renminbi) | ¥ (8,900,095) | $ (1,241,716) | 27,623,718 |  |
Accumulated deficit (in Yuan Renminbi) | (333,852,213) |  |  | ¥ (325,318,655) | $ (46,882,040)
Cash used in operating activities (in Yuan Renminbi) | (13,153,333) | $ (1,836,135) | ¥ 10,944,793 |  |
Cash and cash equivalents (in Yuan Renminbi) | ¥ 2,494,030 |  |  | 12,461,382 | 348,153
Statutory surplus rate | 10.00% | 10.00% |  |  |
Registered capital | 50.00% | 50.00% |  |  |
General reserve fund after tax profits percentage | 10.00% | 10.00% |  |  |
General reserve fund | 50.00% | 50.00% |  |  |
Statutory reserves (in Yuan Renminbi) | ¥ 23,557,710 |  |  | ¥ 23,557,710 | $ 3,318,034
United States of America, Dollars |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Convenience translation rate | 1 |  |  |  | 1
China, Yuan Renminbi |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Convenience translation rate | 7.1636 |  |  |  | 7.1636
Accumulated deficit (in Yuan Renminbi) | ¥ (333,900,000) |  |  |  |
Cash and cash equivalents (in Yuan Renminbi) | ¥ 2,500,000 |  |  |  |
Customer Concentration Risk [Member] | One Supplier [Member] | Purchases [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration Risk, Percentage | 45.00% | 45.00% |  |  |
Customer Concentration Risk [Member] | Two Supplier [Member] | Purchases [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration Risk, Percentage | 25.00% | 25.00% |  |  |
Customer Concentration Risk [Member] | Three Supplier [Member] | Purchases [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration Risk, Percentage | 14.00% | 14.00% |  |  |
Customer Concentration Risk [Member] | One Customer [Member] | Revenue Benchmark [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration Risk, Percentage | 34.00% | 34.00% | 51.00% |  |
Customer Concentration Risk [Member] | One Customer [Member] | Accounts Receivable [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration Risk, Percentage | 69.00% | 69.00% |  | 41.00% |
Customer Concentration Risk [Member] | One Customer [Member] | Contract Liabilities [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration Risk, Percentage | 10.00% | 10.00% |  | 4.00% |
Customer Concentration Risk [Member] | Two Customer [Member] | Revenue Benchmark [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  |  | 28.00% |  |
Customer Concentration Risk [Member] | Two Customer [Member] | Accounts Receivable [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration Risk, Percentage | 28.00% | 28.00% |  | 36.00% |
Customer Concentration Risk [Member] | Two Customer [Member] | Contract Liabilities [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  |  |  | 4.00% |
Customer Concentration Risk [Member] | Three Customer [Member] | Accounts Receivable [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  |  |  | 9.00% |
Customer Concentration Risk [Member] | Three Customer [Member] | Contract Liabilities [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  |  |  | 3.00% |
Customer Concentration Risk [Member] | Four Customer [Member] | Contract Liabilities [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  |  |  | 3.00% |
Customer Concentration Risk [Member] | Five Customer [Member] | Contract Liabilities [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  |  |  | 3.00% |
Related Party [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Due to related parties (in Yuan Renminbi) | ¥ 1,646,245 |  |  | ¥ 1,917,478 | $ 229,807
One Supplier [Member] | Supplier Concentration Risk [Member] | Purchases [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  |  | 42.00% |  |
One Supplier [Member] | Supplier Concentration Risk [Member] | Accounts Payable [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration Risk, Percentage | 68.00% | 68.00% |  | 41.00% |
One Supplier [Member] | Supplier Concentration Risk [Member] | Short-Term Prepayments [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration Risk, Percentage | 44.00% | 44.00% |  | 43.00% |
Two Supplier [Member] | Supplier Concentration Risk [Member] | Purchases [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  |  | 35.00% |  |
Two Supplier [Member] | Supplier Concentration Risk [Member] | Accounts Payable [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration Risk, Percentage | 23.00% | 23.00% |  |  |
Two Supplier [Member] | Supplier Concentration Risk [Member] | Short-Term Prepayments [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration Risk, Percentage | 24.00% | 24.00% |  | 27.00% |
Three Supplier [Member] | Supplier Concentration Risk [Member] | Purchases [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  |  | 18.00% |  |
Three Supplier [Member] | Supplier Concentration Risk [Member] | Short-Term Prepayments [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration Risk, Percentage | 13.00% | 13.00% |  | 23.00% |
Four Supplier [Member] | Supplier Concentration Risk [Member] | Short-Term Prepayments [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  |  |  | 6.00% |
PRC [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Accounts receivable (in Yuan Renminbi) | ¥ 3,700,000 |  |  |  |

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