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Organization and Principal Activities - Schedule of Company’s Major Subsidiaries (Details)
 6 Months Ended 12 Months Ended
Mar. 31, 2025
Sep. 30, 2024
Linkage Holding (Hong Kong) Limited (“Linkage Holding”) [Member]    
Wholly owned subsidiaries    
Date of Incorporation Apr. 13, 2022 [1] Apr. 13, 2022 [2]
Percentage of effective ownership 100.00% [1] 100.00% [2]
Principal Activities Investing holding company [1] Investing holding company [2]
Extend Co., Limited (“EXTEND”) [Member]    
Wholly owned subsidiaries    
Date of Incorporation Jun. 23, 2011 Jun. 23, 2011
Percentage of effective ownership 100.00% 100.00%
Principal Activities Cross-border sales Cross-border sales
Linkage Electronic Commerce Limited (“Linkage Electronic”) [Member]    
Wholly owned subsidiaries    
Date of Incorporation Mar. 11, 2022 Mar. 11, 2022
Percentage of effective ownership 100.00% 100.00%
Principal Activities Cross-border sales Cross-border sales
HQT Network Co., Limited (“HQT NETWORK”) [Member]    
Wholly owned subsidiaries    
Date of Incorporation Dec. 08, 2016 Dec. 08, 2016
Percentage of effective ownership 100.00% 100.00%
Principal Activities Integrated E-commerce training services Integrated E-commerce training services
Linkage (Fujian) Network Technology Limited (“Linkage Tech” or “WFOE”) [Member]    
Wholly owned subsidiaries    
Date of Incorporation Nov. 24, 2022 Nov. 24, 2022
Percentage of effective ownership 100.00% 100.00%
Principal Activities Investing holding company Investing holding company
Fujian Chuancheng Internet Technology Limited (formerly known as “Fujian Haishi Cross border Education Technology Limited”) [Member]    
Wholly owned subsidiaries    
Date of Incorporation Mar. 02, 2021 Mar. 02, 2021
Percentage of effective ownership 100.00% 100.00%
Principal Activities Integrated E-commerce training services Integrated E-commerce training services
Fujian Chuancheng Digital Technology Limited [Member]    
Wholly owned subsidiaries    
Date of Incorporation Jun. 01, 2021 Jun. 01, 2021
Percentage of effective ownership 100.00% 100.00%
Principal Activities Cross-border sales Cross-border sales
[1] Linkage Holding began operations since 2023 as an investing holding company.
[2] Linkage Holding began operations since 2023 as an investing holding company.