The sidebar official configuration is incorrectly written. The correct method is as follows:

[yt46767]

The configuration item sidebar referenced by vuepress(v2.0.0-beta.49) is wrong（https://v2.vuepress.vuejs.org/zh/reference/default-theme/config.html#sidebar）. The correct writing method should be：

module.exports = {
  theme: defaultTheme({
    // 侧边栏对象
    // 不同子路径下的页面会使用不同的侧边栏
    sidebar: {
      '/guide/': [
        {
          text: 'Guide',
          children: ['README', 'getting-started'],
        },
      ],
      '/reference/': [
        {
          text: 'Reference',
          children: ['cli', 'config'],
        },
      ],
    },
  }),
}

The official usage is that sidebar will not be displayed. In fact, it can be displayed as long as the file name string.

[Mister-Hope]

Why don't you try to figure out why these work?????????????????????????????????????????

https://github.com/vuepress/vuepress-next/blob/main/docs/.vuepress/configs/sidebar/en.ts

[yt46767]

There should be a bug in it. Can God tell us why?

[yt46767]

Also, it should be noted that the folder name is in Chinese, and the sidebar cannot be rendered. The English name is OK

[yt46767]

There is a better way: Link address add encodeURI processing. In this way, Chinese URLs can be perfectly supported