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Nature of business and organization (Tables)
 6 Months Ended
Mar. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of shareholder’s
       
Name   Background   Ownership
Shan You International Group Limited   · A Hong Kong company
· Incorporated on March 22, 2023
· A holding company		   100% owned by WF
Sichuan Shanyou Zhiyuan Business Information Consulting Co., Ltd.  

· A PRC limited liability company
· Incorporated on April 28, 2023
· Registered capital of RMB1,000,000 (approximately $0.2 million)

 

· A holding company

   100% owned by Shanyou HK
Chengdu Shanyou HVAC Engineering Co., Ltd.   · A PRC limited liability company
· Incorporated on June 3, 2009
· Registered capital of RMB12,000,000 (approximately $1.9 million)
· Supply, installation, fitting-out and maintenance services for HVAC systems, fresh air ventilation systems, floor heating systems and water purification systems		   100% owned by WFOE

WF International Nevada LLC

 

(“WF Nevada”)

  

· A US limited liability company

 

· Incorporated on December 27, 2023

 

· A holding company

   100% owned by WF

Chengdu Wufang Boyuan Innovation Technology Co., Ltd.

 

(“Wufang Boyuan”)

   · A PRC limited liability company
· Incorporated on April 25, 2025
· Registered capital of RMB50,000,000 (approximately $6.9 million)
· A holding company		   100% owned by WF Nevada