v3.26.1
Organization and nature of operations (Details) - USD ($)
 6 Months Ended
Dec. 13, 2024
Nov. 18, 2024
Nov. 07, 2024
Oct. 22, 2024
Oct. 17, 2024
Dec. 31, 2025
Jun. 30, 2025
Feb. 14, 2023
Sep. 13, 2019
May 11, 2017
Organization and nature of operations [Line Items]                    
Shares authorized for issuance [1]           500,000,000 500,000,000      
Ordinary shares, par value [1]                
Shares issued         50,000          
Acquired shares 480,000                  
Maximum [Member]                    
Organization and nature of operations [Line Items]                    
Shares authorized for issuance         500,000,000          
Ordinary Shares [Member]                    
Organization and nature of operations [Line Items]                    
Shares issued [2]           1,675,000        
Max Holding Limited [Member]                    
Organization and nature of operations [Line Items]                    
Ownership interest percentage     25.00%              
Glitter Win International Limited [Member]                    
Organization and nature of operations [Line Items]                    
Ownership interest percentage     4.80%              
Tight Core Limited [Member]                    
Organization and nature of operations [Line Items]                    
Ownership interest percentage     4.80%              
Storm Citadel Global Limited [Member]                    
Organization and nature of operations [Line Items]                    
Ownership interest percentage     1.00%              
Virtuous Accolade Limited [Member]                    
Organization and nature of operations [Line Items]                    
Ownership interest percentage     4.00%              
BU Creation Limited [Member]                    
Organization and nature of operations [Line Items]                    
Ownership percentage                   100.00%
BU Workshop Limited [Member]                    
Organization and nature of operations [Line Items]                    
Ownership percentage                 75.00%  
BU Production Limited [Member]                    
Organization and nature of operations [Line Items]                    
Ownership percentage               50.00%    
BUBI Services Limited [Member] | Ordinary Shares [Member]                    
Organization and nature of operations [Line Items]                    
Ordinary shares, par value                  
Shares issued         1          
Class A Ordinary Shares [Member]                    
Organization and nature of operations [Line Items]                    
Shares issued     3,960,000              
Unissued ordinary shares         249,999,999          
Class A Ordinary Shares [Member] | Ordinary Shares [Member]                    
Organization and nature of operations [Line Items]                    
Shares authorized for issuance           250,000,000        
Ordinary shares, par value                  
Class A Ordinary Shares [Member] | Glitter Win International Limited [Member]                    
Organization and nature of operations [Line Items]                    
Ownership interest percentage 4.80%                  
Class A Ordinary Shares [Member] | BUBI Services Limited [Member]                    
Organization and nature of operations [Line Items]                    
Ordinary shares, par value                  
Shares issued       6,039,999 1          
Total consideration       $ 1            
Class B Ordinary Shares [Member]                    
Organization and nature of operations [Line Items]                    
Shares issued   5,000,000                
Unissued ordinary shares         250,000,000          
Class B Ordinary Shares [Member] | Ordinary Shares [Member]                    
Organization and nature of operations [Line Items]                    
Shares authorized for issuance           250,000,000        
Ordinary shares, par value                  
Class B Ordinary Shares [Member] | BUBI Services Limited [Member]                    
Organization and nature of operations [Line Items]                    
Ordinary shares, par value                  
[1] Retrospectively presented for the effect of 15,000,000 shares issued on various dates between April 16, 2024 and November 18, 2024 in preparation of the Company’s initial public offering (Note 1).
[2] Retrospectively presented for the effect of 15,000,000 shares issued on various dates between April 16, 2024 and November 18, 2024 in preparation of the Company’s initial public offering (Note 1).