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v3.26.1

Credit risk (Details) ¥ in Millions | Mar. 31, 2026 USD ($) | Mar. 31, 2026 CNY (¥) | Dec. 31, 2025 USD ($)
--- | --- | --- | ---
Credit risk [Line Items] |  |  |
Deposit insurance regulation amount | $ 72,485 | ¥ 0.5 |
CHINA |  |  |
Credit risk [Line Items] |  |  |
Cash | 5,214,957 |  | $ 24,691
American or Cananda [Member] |  |  |
Credit risk [Line Items] |  |  |
Cash | $ 0 |  | $ 0

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