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Related party balances and transactions
 12 Months Ended
Dec. 31, 2024
Related Party Transactions [Abstract]  
Related party balances and transactions

Note 9 – Related party balances and transactions

 

Related party balances

 

 Other receivables - related parties

 

                       
Name of Related Party   Relationship   Nature   December 31,
2024		   December 31,
2023
Fujian Tantan Technology Co, Ltd (“FJ Tantan”)*   FJ Tantan’s legal representative is the secretary of Fujian Hongfa Group Ltd (“Fujian Hongfa”). Fujian Hongfa is the shareholder of FJ LSY.   Interest free, due on June 15, 2025   $ 109,621     $ 111,259  
Fuzhou Jinhui Environmental service Co, Ltd (“FZ Jinhui”)   Fujian Jinshun environmental Co, Ltd (“Jinshun”) is the major shareholder of FZ Jinhui. Weihao Chen is the Major shareholder of Jinshun, and the legal representative of FZ LSY.   Interest free, due on August 31, 2023 (extended to August 31, 2024)     —       4,459  
Yueyu Qi*   Spouse of Wang who is a supervisor of Huzhou CDT   Interest free, due on December 31, 2025   $ 13,911     $ —  
Total           $ 123,532     $ 115,718  

 

* As of the date of the issuance of these consolidated financial statements, these receivables have been repaid by the related parties.   

 

Other payables – related party

 

               
Name of Related Party   Relationship   Nature   December 31,
2024		   December 31,
2023
Wanqiang Lin   Director of Ultra HK   Advance payment for operational expenses of the Company pending for reimbursement   $ 256,863     $ 270,806  

 

Short-term loans - related parties

 

                       
Name of Related Party   Relationship   Nature   December 31,
2024		   December 31,
2023
                 
Beijing Minhongyun Energy Supply Co. Ltd.   Yunwu Li, the Company’s Chief Executive Officer and Chairman of the Board of Directors and Chairman of the Board of Directors and General Manager of Shenzhen CDT Environmental Technology Co., Ltd is the director of this entity   Interest-free loans due on November 30, 2025   $ 1,048,912     $ 1,064,566  
Shenzhen Li Yaxin Industrial Co., Ltd   Yunwu Li, the Company’s Chief Executive Officer and Chairman of the Company’s Board of Directors and Chairman of the Board of Directors and General Manager of Shenzhen CDT Environmental Technology Co., Ltd., is the sole shareholder of this entity   Interest-free loans due on December 10, 2025     97,379       96,009  
Yunwu Li   Chairman of CDT Environmental Technology Co., Ltd.   Interest-free loans due on October 31, 2025     846,854       3,446,578  
Jianzhong Zhao   Legal Representative, General Manager and Director of Hohhot CDT Environmental Technology Co., Ltd.   Interest-free loans due on December 31, 2025     237,868       299,772  
Jianshan Ma   Director and General Manager of Chengde CDT Environmental Technology Co., Ltd.   Interest-free loans due on December 31, 2025     95,264       117,279  
Yan Wang   Relative of Ying Wang, Supervisor of Huzhou CDT Environmental Technology Co., Ltd.   Interest-free loans due on February 28, 2025, extended to February 28, 2026     157,978       160,052  
Zhaozhao Xu   General project manager of Shenzhen CDT Environmental Technology Co., Ltd.   Interest-free loans, due on December 31, 2024     —       32,473  
Yaoyu Zhou   Spouse of Ying Wang, Supervisor of Huzhou CDT Environmental Technology Co., Ltd.   Interest-free loans, due on November 2, 2024     —       155,308  
Xushaozhao   Project manager of Shenzhen CDT Environmental Technology Co., Ltd   Interest-free loans due on demand     310,639       —  
Guangxi Jingxingming Eletrical Ltd   The legal representative of this entity is also the legal representative of Guangxi CWT Environmental Technology Co., Ltd.   Interest-free loans, due on August 22, 2024     —       14,119  
Total           $ 2,794,894     $ 5,386,156  

 

Interest expense pertaining to the loans for the years ended December 31, 2024 and 2023 were amounted to $0, respectively.