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

rk

2025-09-28 a8fb7ae2dbb61a94141ed5e73d3bb2632b7b84df

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