v3.25.4
Cover - shares
 6 Months Ended
Dec. 31, 2025
Feb. 09, 2026
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Entity Interactive Data Current Yes  
Amendment Flag false  
Document Period End Date Dec. 31, 2025  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q2  
Entity Information [Line Items]    
Entity Registrant Name LONGDUODUO COMPANY LIMITED  
Entity Central Index Key 0001892316  
Entity File Number 0-56615  
Entity Tax Identification Number 37-2018431  
Entity Incorporation, State or Country Code NV  
Current Fiscal Year End Date --06-30  
Entity Current Reporting Status Yes  
Entity Shell Company false  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Incorporation, Date of Incorporation Oct. 25, 2021  
Entity Contact Personnel [Line Items]    
Entity Address, Address Line One G3-5-8016 Shui’an Town  
Entity Address, Address Line Two Ruyi Headquarters Base  
Entity Address, Address Line Three Hohhot Economic Development Zone  
Entity Address, City or Town Inner Mongolia  
Entity Address, Country CN  
Entity Address, Postal Zip Code 010000  
Entity Phone Fax Numbers [Line Items]    
City Area Code 0472  
Local Phone Number 510 4980  
Entity Listings [Line Items]    
Title of 12(b) Security None  
No Trading Symbol Flag true  
Security Exchange Name NONE  
Entity Common Stock, Shares Outstanding   30,015,036