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Nature of business and organization (Tables)
12 Months Ended
Dec. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of subsidiaries
       
Name   Background   Ownership
Chao Qiang Holdings Limited (“CQ BVI”)  

A British Virgin Islands company

 

Incorporated on December 14, 2015

 

A holding company

  100% owned by CDT Cayman
CDT Environmental Technology Group Limited (“CDT BVI”)  

A British Virgin Islands company

 

Incorporated on June 26, 2015

 

A holding company

  100% owned by CDT Cayman
Ultra Leader Investments Limited (“Ultra HK”)  

A Hong Kong company

 

Incorporated on February 27, 2015

 

A holding company

  100% owned by CQ BVI
 CDT Environmental Technology (Hong Kong) Limited (“CDT HK”)  

A Hong Kong company

 

Incorporated on July 30, 2015

 

A holding company

  100% owned by CDT BVI

Shenzhen CDT Environmental Technology Co., Ltd.

 

(“Shenzhen CDT”)

 

A PRC limited liability company

 

Incorporated on August 27, 2012

 

Registered capital of RMB 60,000,000

 

Developing, producing, selling and installing sewage treatment systems and providing sewage treatment services

  100% collectively owned by Ultra HK (15%) and CDT HK (85%)

 

Beijing CDT Environmental Technology Co., Ltd.

 

(“BJ CDT”)

 

A PRC limited liability company

 

Incorporated on April 25, 2016

 

Registered capital of RMB 20,000,000

 

Providing sewage treatment services

  100% owned by Shenzhen CDT

Fuzhou LSY Environmental Technology Co., Ltd.

 

(“FJ LSY”)

 

A PRC limited liability company

 

Incorporated on March 13, 2015

 

Registered capital of RMB 5,000,000

 

Providing sewage treatment services

  51% owned by Shenzhen CDT

 

Tianjin CDT Environmental Technology Co., Ltd.

 

(“TJ CDT”)

 

A PRC limited liability company

 

Incorporated on October 22, 2014

 

Registered capital of RMB 10,000,000

 

Providing sewage treatment services

  100% owned by Shenzhen CDT

Chengde CDT Environmental Technology Co., Ltd.

 

(“CD CDT”)

 

A PRC limited liability company

 

Incorporated on March 26, 2015

 

Registered capital of RMB 5,000,000

 

Providing sewage treatment services

  51% owned by Shenzhen CDT

Beijing Innovation CDT Environmental Technology Co., Ltd.

 

(“BJ CX CDT”)

 

A PRC limited liability company

 

Incorporated on September 7, 2016

 

Registered capital of RMB 5,000,000

 

Providing sewage treatment services

  51% owned by Shenzhen CDT

Baoding CDT Environmental Technology Co., Ltd.

 

(“BD CDT”)

 

A PRC limited liability company

 

Incorporated on October 21, 2015

 

Registered capital of RMB 5,000,000

 

Providing sewage treatment services

  51% owned by Shenzhen CDT

Hengshui CDT Environmental Technology Co., Ltd.

 

(“HS CDT”)

 

A PRC limited liability company

 

Incorporated on May 18, 2015

 

Registered capital of RMB 3,000,000

 

Providing sewage treatment services

  51% owned by Shenzhen CDT

Guangxi CWT Environmental Technology Co., Ltd.

 

(“GX CDT”) (2)

 

A PRC limited liability company

 

Incorporated on January 29, 2016

 

Registered capital of RMB 5,000,000

 

Providing sewage treatment services

  51% owned by Shenzhen CDT

Huzhou CDT Environmental Technology Co., Ltd.

 

(“HZ CDT”)

 

A PRC limited liability company

 

Incorporated on February 6, 2015

 

Registered capital of RMB 5,000,000

 

Providing sewage treatment services

  51% owned by Shenzhen CDT

Hohhot CDT Environmental Technology Co., Ltd.

 

(“HHHT CDT”)

 

 

 

A PRC limited liability company

 

Incorporated on February 11, 2015

 

Registered capital of RMB 5,000,000

 

Providing sewage treatment services

  51% owned by Shenzhen CDT

Taiyuan CDT Environmental Technology Co., Ltd.

 

(“TY CDT”) (3)

 

A PRC limited liability company

 

Incorporated on March 23, 2015

 

Registered capital of RMB 5,000,000

 

Providing sewage treatment services

  51% owned by Shenzhen CDT

Xiamen YDT Environmental Technology Co., Ltd.

 

(“XM YDT”) (1)

 

A PRC limited liability company

 

Incorporated on April 9, 2015

 

Registered capital of RMB 5,000,000

 

Providing sewage treatment services

  51% owned by Shenzhen CDT

 

(1) In January 2022, the Company disposed of its entire 51% ownership in XM YDT and transferred its ownership to a third party for consideration of approximately $5,000. The disposal of XM YDT did not have a material impact on the Company’s consolidated financial statements.

 

(2) In March 2024, the Company disposed of its entire 51% ownership in GX CDT and transferred its ownership to Chun’E Zhao, the legal representative of GX CDT for consideration of RMB 500. The disposal of GX CDT did not have a material impact on the Company’s consolidated financial statements. 

 

(3) In June 2024, the Company disposed of its entire 51% ownership in TY CDT and transferred its ownership to a third party for consideration of RMB 1,000. The disposal of TY CDT did not have a material impact on the Company’s consolidated financial statements.