Summary of significant accounting policies (Details Narrative) |
6 Months Ended | 12 Months Ended | |||||
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Jun. 30, 2026
USD ($)
$ / shares
shares
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Jun. 30, 2026
CNY (¥)
¥ / shares
shares
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Jun. 30, 2025
CNY (¥)
¥ / shares
shares
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Dec. 31, 2025
CNY (¥)
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Jun. 30, 2026
CNY (¥)
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| Foreign currency transactions | The balance sheet amounts, with the exception of shareholders’ equity at December 31, 2025 and June 30, 2026 were translated at USD 1.00 to RMB 7.0288 and to RMB 6.8109, respectively. The average translation rates applied to statement of income accounts for the six months ended June 30, 2025 and 2026 were USD 1.00 to RMB 7.1839, and RMB 6.8932, respectively. The shareholders’ equity accounts were stated at their historical rate. | The balance sheet amounts, with the exception of shareholders’ equity at December 31, 2025 and June 30, 2026 were translated at USD 1.00 to RMB 7.0288 and to RMB 6.8109, respectively. The average translation rates applied to statement of income accounts for the six months ended June 30, 2025 and 2026 were USD 1.00 to RMB 7.1839, and RMB 6.8932, respectively. The shareholders’ equity accounts were stated at their historical rate. | |||||
| Allowance for credit losses of accounts receivable | ¥ 11,012 | ¥ 75,000 | |||||
| Credit losses for prepaid services fees | $ 6,733 | 45,857 | ¥ 22,149 | ||||
| Credit losses for other receivables | 656,718 | 4,874,917 | ¥ 4,472,840 | ||||
| Equity method investment | 161,960 | 1,103,089 | |||||
| Impairment of long-lived assets | 0 | 0 | |||||
| Convertible notes payable | (0) | ¥ 0 | ¥ 0 | ||||
| Total government subsidies | 100,717 | ||||||
| Other Income expense net | 11,181 | 76,150 | 101,963 | ||||
| Employee benefit | $ 103,550 | ¥ 705,268 | ¥ 765,260 | ||||
| Basic | shares | [1] | 12,437,461 | 12,437,461 | 2,776,005 | |||
| Diluted | shares | 12,437,461 | 12,437,461 | 2,776,005 | ||||
| Basic loss per share | (per share) | [1] | $ (2.77) | ¥ (18.88) | ¥ 9.54 | |||
| Diluted loss per share | (per share) | [1] | (2.77) | (18.88) | 9.54 | |||
| Class A Ordinary Shares [Member] | |||||||
| Basic loss per share | (per share) | 2.77 | 18.88 | 9.54 | ||||
| Diluted loss per share | (per share) | $ 2.77 | ¥ 18.88 | ¥ 9.54 | ||||
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- References No definition available.
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- References No definition available.
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- References No definition available.
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- Definition Amount of increase (decrease) in allowance for credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of allowance for credit loss on receivable, classified as other and current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of a written promise to pay a note, initially due after one year or beyond the operating cycle if longer, which can be exchanged for a specified amount of one or more securities (typically common stock), at the option of the issuer or the holder. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of expense for employee benefit and equity-based compensation. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Description of transaction giving rise to foreign currency transaction gain (loss), including but not limited to, nature of the transaction, the foreign currency involved, the accounting for the transaction. No definition available.
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- Definition The charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of expense or loss included in net income that result in no cash flow, classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Details
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