Merge remote-tracking branch 'origin/wuhuyancao' into wuhuyancao

doum

2025-10-31 22881a4d6409c7d17867e1d40bf81a13578208df

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package com.doumee;
 
public class Main {
    public static void main(String[] args) {
        System.out.println("Hello world!");
    }
}