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Land use right net (Details 2) - ZHEJIANG TIANLAN - CNY (¥) | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
2021 |  | ¥ 159,000
2022 | ¥ 150,000 | 159,000
2023 | 150,000 | 159,000
2024 | 150,000 | 159,000
2025 | 150,000 | 159,000
2026 | 150 |
Thereafter | 4,247,000 | 4,352,000
Total | ¥ 4,997,000 | ¥ 5,147,000

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