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

doum

2025-10-17 cb6aca0642ac8dd5de877ade168066d85acb589c

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