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Preferred shares (Details Narrative) ¥ in Millions |  |  |  | 1 Months Ended | 8 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Feb. 23, 2023 shares | May 23, 2019 CNY (¥) shares | Nov. 22, 2018 shares | Jan. 31, 2022 USD ($) shares | Jul. 31, 2021 USD ($) shares | Jun. 30, 2021 USD ($) shares | Jun. 30, 2021 CNY (¥) shares | Apr. 30, 2021 USD ($) shares | Oct. 31, 2019 CNY (¥) shares | Jan. 31, 2019 USD ($) shares | Aug. 31, 2017 CNY (¥) shares | Jul. 31, 2016 CNY (¥) shares | Jul. 31, 2015 CNY (¥) shares | Sep. 14, 2023 CNY (¥) | Dec. 31, 2025 | Dec. 31, 2022 CNY (¥) | Dec. 31, 2021 CNY (¥)
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Implied valuation | $ |  |  |  | $ 800,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ordinary shares |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Offering price percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 75.00% |  |
Compound interest rate of capital contribution |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10.00% |  |
Accretion of preferred shares | ¥ |  |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 762.2 |  | ¥ 188.3 | ¥ 101.5
Series C Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued |  |  |  |  |  |  |  | 1,955,000 |  | 1,877,135 |  |  |  |  |  |  |
Consideration | $ |  |  |  | $ 19,700,000 |  |  |  | $ 15,000,000.0 |  | $ 17,400,000 |  |  |  |  |  |  |
Excess stock shares Issued |  |  |  |  |  |  |  | 782,000 |  | 150,171 |  |  |  |  |  |  |
Shares authorized to be repurchased |  |  |  | 276,007.50 |  |  |  |  |  |  |  |  |  |  |  |  |
Series D1 Preferred Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued |  |  |  |  |  | 399,496 | 399,496 |  |  |  |  |  |  |  |  |  |
Consideration | ¥ |  |  |  |  |  |  | ¥ 20.0 |  |  |  |  |  |  |  |  |  |
Series D2 Preferred Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Excess stock shares Issued |  |  |  |  |  | 260,667 | 260,667 |  |  |  |  |  |  |  |  |  |
Shenzhen Ruiyuan Investment Enterprise LLP [Member] | Series PreA Financing [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued |  |  |  |  |  |  |  |  |  |  |  |  | 146,903 |  |  |  |
Consideration | ¥ |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 30.0 |  |  |  |
Shenzhen Ruiyuan Investment Enterprise, LLP [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued in transaction |  |  |  |  |  |  |  |  |  |  |  |  | 108,891 |  |  |  |
Ruiyuan Technology Holdings Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued in transaction | 559,868 |  |  |  |  | 4,429,111 | 4,429,111 |  |  |  |  |  |  |  |  |  |
Ruiyuan Technology Holdings Limited [Member] | Series PreA Financing [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued |  |  |  |  |  |  |  |  |  | 5,444,575 |  |  |  |  |  |  |
Cicw Holdings Limited [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration | ¥ |  |  |  |  |  |  |  |  | ¥ 6.0 |  |  |  |  |  |  |  |
Number of shares issued in transaction |  |  |  |  |  |  |  |  | 1,015,462 |  |  |  |  |  |  |  |
Beijing Zhongyun Ronghui Investment Center, LLP [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued in transaction | 606,524 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beijing Zhongyun Ronghui Investment Center, LLP [Member] | Series A Financing [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued |  |  |  |  |  |  |  |  |  |  |  | 91,814 |  |  |  |  |
Beijing Zhongyun Ronghui Investment Center, LLP [Member] | Series A Convertible Redeemable Preferred Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible redeemable preferred shares |  |  | 4,590,703 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beijing Zhongyun Ronghui Investment Center, LLP [Member] | Series A Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued |  | 4,590,703 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration | ¥ |  | ¥ 0.4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beijing Zhongyun Ronghui Investment Center, LLP [Member] | Series B Financing [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued |  |  |  |  |  |  |  |  |  |  | 6,886 |  |  |  |  |  |
Consideration | ¥ |  |  |  |  |  |  |  |  |  |  | ¥ 7.5 |  |  |  |  |  |
Beijing Zhongyun Ronghui Investment Center, LLP [Member] | Series B Convertible Redeemable Preferred Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible redeemable preferred shares |  |  | 344,303 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beijing Zhongyun Ronghui Investment Center, LLP [Member] | Series B Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued |  | 344,303 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration | ¥ |  | ¥ 0.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Hangzhou Shunying Equity Investment Enterprise LLP [Member] | Series A Financing [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued |  |  |  |  |  |  |  |  |  |  |  | 91,814 |  |  |  |  |
Consideration | ¥ |  |  |  |  |  |  |  |  |  |  |  | ¥ 25.0 |  |  |  |  |
Beijing Zhongyun Ronghui Investment Center LLP [Member] | Series A Financing [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration | ¥ |  |  |  |  |  |  |  |  |  |  |  | ¥ 25.0 |  |  |  |  |
Hangzhou Shunying [Member] | Series A Convertible Redeemable Preferred Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible redeemable preferred shares |  |  | 4,590,703 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Hangzhou Shunying [Member] | Series B Financing [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued |  |  |  |  |  |  |  |  |  |  | 6,886 |  |  |  |  |  |
Consideration | ¥ |  |  |  |  |  |  |  |  |  |  | ¥ 7.5 |  |  |  |  |  |
Hangzhou Shunying [Member] | Series B Convertible Redeemable Preferred Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Convertible redeemable preferred shares |  |  | 344,303 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ningbo Shiwei Enterprise Management Partnership (L.P.) [Member] | Series A Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued |  | 4,590,703 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration | ¥ |  | ¥ 0.4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Huzhou Zhongze Jiameng Equity Investment Enterprise LLP [Member] | Series B Financing [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued |  |  |  |  |  |  |  |  |  |  | 55,088 |  |  |  |  |  |
Consideration | ¥ |  |  |  |  |  |  |  |  |  |  | ¥ 60.0 |  |  |  |  |  |
Zhuhai Hengqin Huarong Zhifu Investment Management Co Ltd [Member] | Series B Financing [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued |  |  |  |  |  |  |  |  |  |  | 91,814 |  |  |  |  |  |
Consideration | ¥ |  |  |  |  |  |  |  |  |  |  | ¥ 100.0 |  |  |  |  |  |
Eagle Rover Ltd [Member] | Series B Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued |  |  |  |  |  |  |  |  |  | 2,754,422 |  |  |  |  |  |  |
LianJia Enterprise Limited [Member] | Series B Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued |  |  |  |  |  |  |  |  |  | 4,590,704 |  |  |  |  |  |  |
Ningbo Shiwei Enterprise Management Partnership (L.P.) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued in transaction | 606,524 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ningbo Shiwei Enterprise Management Partnership (L.P.) [Member] | Series B Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued |  | 344,303 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration | ¥ |  | ¥ 0.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Yonghe CT Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued in transaction | 1,522,101 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Yonghe CT Limited [Member] | Series D2 Preferred Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued |  |  |  |  |  | 651,667 | 651,667 |  |  |  |  |  |  |  |  |  |
Consideration | $ |  |  |  |  |  | $ 5,000,000.0 |  |  |  |  |  |  |  |  |  |  |
Yonghe SI Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued in transaction | 110,352 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Yonghe SI Limited [Member] | Series D2 Preferred Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued |  |  |  |  |  | 113,390 | 113,390 |  |  |  |  |  |  |  |  |  |
Consideration | $ |  |  |  |  |  | $ 900,000 |  |  |  |  |  |  |  |  |  |  |
Image Digital Investment (HK) Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued in transaction | 8,117,877 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Image Digital Investment (HK) Limited [Member] | Series D3 Preferred Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued |  |  |  |  | 8,341,333 |  |  |  |  |  |  |  |  |  |  |  |
Consideration | $ |  |  |  |  | $ 64,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |
TPP Fund II Holding F Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued in transaction | 2,029,469 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
TPP Fund II Holding F Limited [Member] | Series D3 Preferred Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued |  |  |  |  | 2,085,333 |  |  |  |  |  |  |  |  |  |  |  |
Consideration | $ |  |  |  |  | $ 16,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |
Huzhou Zhongze BVI [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued in transaction | 1,119,736 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Zhuhai Hengqin BVI [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued in transaction | 1,866,227 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Yonghe CarTech Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued in transaction | 1,014,735 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
United Gemini Holdings Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued in transaction | 388,793 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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