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Nature of business and organization (Tables) | 6 Months Ended
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Mar. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of shareholder’s |
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

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