v3.26.1
Summary of Significant Accounting Policies (Details)
6 Months Ended
Apr. 30, 2026
USD ($)
segment
Apr. 30, 2026
CNY (¥)
segment
Apr. 30, 2025
USD ($)
Apr. 30, 2026
CNY (¥)
Oct. 31, 2025
USD ($)
Oct. 31, 2024
USD ($)
Summary of Significant Accounting Policies (Details) [Line Items]            
Deposit insurance coverage amount (in Yuan Renminbi) | ¥       ¥ 500,000    
Deposits number of working days repaid 7 days 7 days        
Cash amount (in Yuan Renminbi) | ¥       ¥ 500,000    
Effects on adoption of ASC 326 $ 3,553          
Allowance for credit losses $ 2,469,626       $ 1,595,831 $ 741,753
Prepaid expenses with a benefit period 1 year 1 year        
Impairment $ 0   $ 0      
Unperformed obligations $ 5,200,000 ¥ 35,700,000        
Percentage of tax benefit 25.00% 25.00% 25.00%      
Number of operating segment (in segment) | segment 2 2        
Number of reported segment (in segment) | segment 2 2        
Wastewater Treatment Revenue Member            
Summary of Significant Accounting Policies (Details) [Line Items]            
Unperformed obligations $ 6,000,000 ¥ 41,000,000        
Income Taxes [Member]            
Summary of Significant Accounting Policies (Details) [Line Items]            
Percentage of tax benefit 50.00% 50.00%