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Organization and business (Details) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
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
Euro Tech (China) Limited |  |  |  |
Percentage of equity ownership | [1] | 0.00% |  | 100.00%
Place of incorporation |  | Hong Kong |  | Hong Kong
Principal activities |  | Inactive |  | Inactive
Euro Tech Trading (Shanghai) Limited |  |  |  |
Percentage of equity ownership |  | 100.00% |  | 100.00%
Place of incorporation |  | The PRC |  | The PRC
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
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
Shanghai Euro Tech Environmental Engineering Company Limited |  |  |  |
Percentage of equity ownership |  | 100.00% |  | 100.00%
Place of incorporation |  | The PRC |  | The PRC
Principal activities |  | Inactive |  | Inactive
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
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 |  | Selling 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
Zhejiang Tianlan Environmental Protection Technology Co. Ltd. |  |  |  |
Percentage of equity ownership | [2] | 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
Zhejiang Tianlan Environmental Protection Engineering Company Limited | ZHEJIANG TIANLAN |  |  |  |
Percentage of equity ownership |  | 100.00% | [3] | 0.00%
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% |  | 40.80%
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% |  | 100.00%
Place of incorporation |  | PRC |  | PRC
Principal activities |  | Manufacturing of environmental protection equipment |  | Manufacturing of environmental protection equipment
[1] | This company was deregistered on April 3, 2020.
[2] | The Groups interest in Blue Sky has been counted for as an affiliate using the equity method as the Group has representation on both the Board and Executive Committee of Blue Sky, and the ability to participate in the decision-making process and exercise significant influence.
[3] | This company was acquired in August 2020.

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