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Percentage of statutory surplus rate.

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

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Amount of cash inflow (outflow) from operating activity, including, but not limited to, discontinued operation. Operating activity includes, but is not limited to, transaction, adjustment, and change in value not defined as investing or financing activity.

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Amount of liabilities classified as other, due within one year or the normal operating cycle, if longer.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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Summary of Significant Accounting Policies (Details)	6 Months Ended			12 Months Ended
Summary of Significant Accounting Policies (Details)	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