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Intangible assets, net (Tables) - ZHEJIANG TIANLAN | 12 Months Ended
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Dec. 31, 2021
Intangible assets, net |
|  | December 31, |
|  | 2021 |  |  | 2020 |
|  | RMB’000 |  |  | RMB’000 |
Amortizable i ntangible a ssets |  |  |  |  |  |
Gross carrying amount |  |  |  |  |  |
Patents |  |  | 3,750 |  |  |  | 3,750 |
Others |  |  | 165 |  |  |  | 165 |
|  |  | 3,915 |  |  |  | 3,915 |
Less: Accumulated amortization |  |  | (2,050 | ) |  |  | (1,795 | )
Net carrying amount |  |  | 1,865 |  |  |  | 2,120 |
Amortization expense |
|  | Year ended December 31, |
|  | 2021 |  |  | 2020 |  |  | 2019 |
|  | RMB’000 |  |  | RMB’000 |  |  | RMB’000 |
Amortization expense |  |  | 255 |  |  |  | 142 |  |  |  | 152 |
|  | Future amortization expense |
|  | RMB’000 |
2022 |  |  | 255 |
2023 |  |  | 255 |
2024 |  |  | 255 |
2025 |  |  | 255 |
2026 |  |  | 255 |
Thereafter |  |  | 590 |
Total |  |  | 1,865 |
|  | Future amortization expense |
|  | RMB’000 |
2021 |  |  | 142 |
2022 |  |  | 142 |
2023 |  |  | 142 |
2024 |  |  | 142 |
2025 |  |  | 142 |
Thereafter |  |  | 1,410 |
Total |  |  | 2,120 |

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