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Organization and business | 12 Months Ended
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Dec. 31, 2022
Organization and business | Note 1: Organization and Business Background Euro Tech Holdings Company Limited (the “Company” or “CLWT”) 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 Company’s principal subsidiaries at December 31, 2022 and 2021 are set out below. Description of subsidiar ies
Company name |  | Place of incorporation and principal place of operation |  | Principal activities and place of operation |  | Effective interest held
|  |  |  |  |  | 2022 |  | 2021
Euro Tech (Far East) Limited |  | Hong Kong |  | Marketing and trading of water and waste water related process control, analytical and testing instruments, disinfection equipment, supplies and related automation systems |  | 100% |  | 100%
Euro Tech Trading (Shanghai) Limited |  | The PRC |  | Inactive |  | 100% |  | 100%
Shanghai Euro Tech Limited |  | The PRC |  | Manufacturing of analytical and testing equipment |  | 100% |  | 100%
Shanghai Euro Tech Environmental Engineering Company Limited |  | The PRC |  | Inactive |  | - (note 1) |  | -
Yixing Pact Environmental Technology Co., Ltd. |  | The PRC |  | Design, manufacturing and operation of water and waste water treatment machinery and equipment |  | 58% |  | 58%
Pact Asia Pacific Limited |  | The British Virgin Islands |  | Sale of environmental protection equipment, undertaking environment protection projects and providing relevant technology advice, training and services |  | 58% |  | 58%
Non-consolidating affiliate: |  |  |  |  |  |
Zhejiang Tianlan Environmental Protection Technology Co. Ltd (“Blue Sky”) * |  | The PRC |  | Design, general contract, equipment manufacturing, installation, testing and operation management of the treatment of waste gases emitted |  | 19.4% |  | 19.4%
Note 1: This company was dissolved on July 2, 2021. * The Company’s interest in Blue Sky has been counted for as an affiliate using the equity method as the Company 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. The Company and its subsidiaries are hereinafter referred to as (the “Group”).
ZHEJIANG TIANLAN |
Organization and business |
1. | 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 limited 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 and suspended trading from November 24, 2020 and resumed trading on January 6, 2021. The Group’s principal subsidiaries at December 31, 2022 and 2021 are set out below.
Name of entity |  | Ownership interest held by the Group |  |  | Place of incorporation and principal place of operation |  | Principal activities |
|  | 2022 |  |  | 2021 |  |  |  |  |  |
Zhejiang Tianlan Environmental Protection Engineering Company Limited |  |  | 100 | %* |  |  | 100 | %* |  | PRC |  | Design, general contract, installation and operating management of environmental protection projects |
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 |  |  | 38.25 | % |  |  | 38.25 | % |  | PRC |  | Manufacturing of environmental protection equipment |
Hangzhou Tiancan Environmental Technology Company Limited |  |  | 80 | % |  |  | 80 | % |  | PRC |  | Manufacturing of environmental protection equipment |
Hangzhou Zhongyi Ecological and Environmental Consulting Company Limited |  |  | 40.1 | %** |  |  | - |  |  | PRC |  | Consultation services of environmental protection projects |
* This company was acquired in August 2020. ** This company was acquired in April 2022.

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- Definition The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -URI https://asc.fasb.org/topic&trid=2122149 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -URI https://asc.fasb.org/topic&trid=2197479 + Details
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