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Lease obligations (Details 2) ¥ in Thousands, $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2024 CNY (¥) | Dec. 31, 2023 CNY (¥)
Operating lease right-of-use assets | $ 101 | $ 233 |  |
Current portion of long-term operating lease obligations | 83 | 170 |  |
Long-term operating lease obligations, net of current maturities | 9 | 44 |  |
Total operating lease liabilities | $ 92 | $ 214 |  |
Weighted average remaining lease term : Operating leases | 3 months | 3 months |  |
Weighted average discount rate : operating leases | 5.00% | 5.45% | 5.00% | 5.45%
Accumulated depreciation and impairment losses | $ (1,092) | $ (1,089) |  |
Property, plant and equipment, net | 159 | 168 |  |
ZHEJIANG TIANLAN |  |  |  |
Accumulated depreciation and impairment losses | ¥ |  |  | ¥ (74,681) | ¥ (68,506)
Property, plant and equipment, net | ¥ |  |  | ¥ 57,738 | 63,505
ZHEJIANG TIANLAN | Lease obligations |  |  |  |
Operating lease right-of-use assets | 2,529 | 0 |  |
Current portion of long-term operating lease obligations | 563 | 0 |  |
Long-term operating lease obligations, net of current maturities | 1,542 |  |  |
Total operating lease liabilities | $ 2,105 | $ 0 |  |
Weighted average remaining lease term : Operating leases | 33 months |  |  |
Weighted average discount rate : operating leases | 3.60% |  | 3.60% |
Accumulated depreciation and impairment losses | $ (141) |  |  | 0
Property, plant and equipment, net | $ 2,388 |  |  | ¥ 0

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