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v3.23.1

Subsequent events (Details) ¥ in Millions | Jan. 14, 2023 USD ($) | Jan. 14, 2023 CNY (¥) | Jan. 07, 2023 USD ($) | Jan. 07, 2023 CNY (¥) | Jan. 05, 2023 USD ($) | Jan. 05, 2023 CNY (¥) | Jan. 05, 2024 | Jan. 17, 2023 USD ($) | Jan. 14, 2023 CNY (¥) | Jan. 12, 2023 USD ($) | Jan. 12, 2023 CNY (¥) | Jan. 06, 2023 USD ($) | Jan. 06, 2023 CNY (¥)
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Subsequent events (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum amount |  |  |  |  | $ 1,600,000 |  |  |  |  |  |  |  |
Short-term loans percentage |  |  |  |  | 3.85% |  |  |  |  |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent events (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum amount | $ 1,400,000 | ¥ 10.0 | $ 1,400,000 | ¥ 10.0 |  | ¥ 10.0 |  |  |  |  |  |  |
Bearing interest | $ 129 |  |  |  | $ 120 |  |  |  |  |  |  |  |
Short-term loans percentage | 4.70% |  | 3.65% | 3.65% |  |  |  |  | 4.70% |  |  |  |
Amount borrowed |  |  |  |  |  |  |  | $ 1,400,000 | ¥ 10.0 | $ 700,000 | ¥ 5.0 | $ 1,400,000 | ¥ 10.0
Utilized amount |  |  |  |  | $ 200,000 | ¥ 1.5 |  |  |  |  |  |  |
Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent events (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate percentage |  |  |  |  |  |  | 2.70% |  |  |  |  |  |

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