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Organization and business (Details) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Zhejiang Tianlan Environmental Protection Engineering Company Limited | ZHEJIANG TIANLAN |  |
Percentage of equity ownership | 100.00% | 100.00%
Place of incorporation | PRC | PRC
Principal activities | Design, general contract, installation and operating management of environmental protection projects | Design, general contract, installation and operating management of environmental protection projects
Hangzhou Tianlan Environmental Protection Equipment Company Limited | ZHEJIANG TIANLAN |  |
Percentage of equity ownership | 51.00% | 51.00%
Place of incorporation | PRC | PRC
Principal activities | Manufacturing and installation services of environmental protection equipment | Manufacturing and installation services of environmental protection equipment
Hangzhou Tianlan Pure Environmental Protection Technology Company Limited | ZHEJIANG TIANLAN |  |
Percentage of equity ownership | 38.25% | 38.25%
Place of incorporation | PRC | PRC
Principal activities | Manufacturing of environmental protection equipment | Manufacturing of environmental protection equipment
Hangzhou Tiancan Environmental Technology Company Limited | ZHEJIANG TIANLAN |  |
Percentage of equity ownership | 80.00% | 80.00%
Place of incorporation | PRC | PRC
Principal activities | Manufacturing of environmental protection equipment | Manufacturing of environmental protection equipment
Hangzhou Zhongyi Ecological and Environmental Consulting Company Limited | ZHEJIANG TIANLAN |  |
Percentage of equity ownership | 40.10% | 0.00%
Place of incorporation | PRC | PRC
Principal activities | Consultation services of environmental protection projects | Consultation services of environmental protection projects
Shanghai Euro Tech Environmental Engineering Company Limited |  |
Percentage of equity ownership | 0.00% | 0.00%
Place of incorporation | The PRC | The PRC
Principal activities | Inactive | Inactive
Shanghai Euro Tech Limited |  |
Percentage of equity ownership | 100.00% | 100.00%
Place of incorporation | The PRC | The PRC
Principal activities | Manufacturing of analytical and testing equipment | Manufacturing of analytical and testing equipment
Euro Tech Trading (Shanghai) Limited |  |
Percentage of equity ownership | 100.00% | 100.00%
Place of incorporation | The PRC | The PRC
Principal activities | Inactive | Inactive
Euro Tech (Far East) Limited |  |
Percentage of equity ownership | 100.00% | 100.00%
Place of incorporation | Hong Kong | Hong Kong
Principal activities | Marketing and trading of water and waste water related process control, analytical and testing instruments, disinfection equipment, supplies and related automation systems | Marketing and trading of water and waste water related process control, analytical and testing instruments, disinfection equipment, supplies and related automation systems
Zhejiang Tianlan Environmental Protection Technology Co. Ltd. |  |
Percentage of equity ownership | 19.40% | 19.40%
Place of incorporation | The PRC | The PRC
Principal activities | Design, general contract, equipment manufacturing, installation, testing and operation management of the treatment of waste gases emitted | Design, general contract, equipment manufacturing, installation, testing and operation management of the treatment of waste gases emitted
Pact Asia Pacific Limited |  |
Percentage of equity ownership | 58.00% | 58.00%
Place of incorporation | The British Virgin Islands | The British Virgin Islands
Principal activities | Sale of environmental protection equipment, undertaking environment protection projects and providing relevant technology advice, training and services | Selling of environmental protection equipment, undertaking environment protection projects and providing relevant technology advice, training and services
Yixing Pact Environmental Technology Co., Ltd |  |
Percentage of equity ownership | 58.00% | 58.00%
Place of incorporation | The PRC | The PRC
Principal activities | Design, manufacturing and operation of water and waste water treatment machinery and equipment | Design, manufacturing and operation of water and waste water treatment machinery and equipment

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