v3.26.3
Prepayment and other current assets (Tables)
6 Months Ended
Jun. 30, 2026
Prepayment and other current assets  
Summary of prepayment and other current assets

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As of

  ​ ​ ​

As of

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As of

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December 31, 

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June 30,

  ​ ​ ​

June 30,

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2025

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2026

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2026

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RMB

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RMB

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US$

Prepaid expenses

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11,937,161

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8,071,162

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1,189,542

Prepayment for intangible assets

 

43,352,840

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25,070,945

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3,695,000

Employee loans

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2,729,457

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1,874,808

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276,313

Other project investment

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1,683,616

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—

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—

Other receivables

 

1,937,493

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3,007,897

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443,309

Total

 

61,640,567

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38,024,812

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5,604,164