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Organization and business | 12 Months Ended
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Dec. 31, 2019
Organization and business | Euro Tech Holdings Company Limited (the “Company”) was incorporated in the British Virgin Islands on September 30, 1996. Euro Tech (Far East) Limited (“Far East”) is the principal operating subsidiary of the Company. It is principally engaged in the marketing and trading of water and waste water related process control, analytical and testing instruments, disinfection equipment, supplies and related automation systems in Hong Kong and in the People’s Republic of China (the “PRC”). The Group’s principal subsidiaries at December 31, 2019 are set out below.
| Name of entity | Ownership interest held by the Group | Place of incorporation and principal place of operation | Principal activities
|  | 2019 | 2018 |  |  |
| Euro Tech (Far East) Limited | 100% | 100% | Hong Kong | 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 | 100% - | 100% | Hong Kong | Inactive |
| Euro Tech Trading (Shanghai) Limited | 100% | 100% | The PRC | 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 | 100% | 100% | The PRC | Manufacturing of analytical and testing equipment |
| Shanghai Euro Tech Environmental Engineering Company Limited | 100% | 100% | The PRC | Undertaking water and waste-water treatment engineering projects |
| Chongqing Euro Tech Rizhi Technology Co., Ltd. | # | 100% | The PRC | Marketing and trading of water and waste water related process control, analytical and testing instruments, disinfection equipment, supplies and related automation systems |
| Rizhi Euro Tech Instrument (Shaanxi) Co., Ltd. | ## | 100% | The PRC | Marketing and trading of water and waste water related process control, analytical and testing instruments, disinfection equipment, supplies and related automation systems |
- This company was deregistered on April 3, 2020. # This company was dissolved on December 12, 2019. ## This company was dissolved on December 24, 2019.
| Name of entity | Ownership interest held by the Group | Place of incorporation and principal place of operation | Principal activities
|  | 2019 | 2018 |  |  |
| Guangzhou Euro Tech Environmental Equipment Co., Ltd. | ** | 100% | The PRC | Marketing and trading of water and waste water related process control, analytical and testing instruments, disinfection equipment, supplies and related automation systems |
| Yixing Pact Environmental Technology Co., Ltd. | 58% | 58% | The PRC | Design, manufacturing and operation of water and waste water treatment machinery and equipment |
| Pact Asia Pacific Limited | 58% | 58% | The British Virgin Islands | Selling of environmental protection equipment, undertaking environment protection projects and providing relevant technology advice, training and services |
| Affiliate: |  |  |  |  |
| Zhejiang Tianlan Environmental Protection Technology Co. Ltd. (“Blue Sky”) | 19.4% * | 19.4% * | The PRC | Design, general contract, equipment manufacturing, installation, testing and operation management of the treatment of waste gases emitted |
* The Group’s 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. ** This company was dissolved on March 18, 2019.
ZHEJIANG TIANLAN |
Organization and business | Zhejiang Tianlan Environmental Protection Technology Company Limited (the “Company”) was incorporated in Hangzhou City, Zhejiang Province, the People's Republic of China (“PRC”) on May 18, 2000. The Company is a limited liability company by shares with an operating period up to long term. The Company provides a comprehensive service for design, general contract, equipment manufacturing, installation, testing and operation management of the treatment of waste gases emitted from various boilers and industrial furnaces of power plants, steel works and chemical plants since 2000. The Company has listed its shares on the New Third Board in the PRC since November 17, 2015 and suspended trading from August 15, 2017 and resumed trading on February 2, 2018. The Group’s principal subsidiaries at December 31, 2019 are set out below.
Name of entity |  | Ownership interest held by the Group |  | Place of incorporation and principal place of operation | Principal activities
|  | 2019 |  |  | 2018 |  |  |
Hangzhou Tianlan Environmental Protection Equipment Company Limited |  |  | 51 | % |  |  | 51 | % | PRC | Manufacturing and installation services of environmental protection equipment
Hangzhou Tianlan Pure Environmental Protection Technology Company Limited |  |  | 40.8 | % |  |  | 51 | % | PRC | Manufacturing of environmental protection equipmen
Hangzhou Tiancan Environmental Technology Company Limited |  |  | 100 | % |  |  | 100 | % | PRC | Manufacturing of environmental protection equipment

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