When I post an article on facebook I got always the same image?

This means that you are using a"meta" that is forcing a default image to be posted on facebook. The meta is something like and it should be present inside the tag at the top of your page. . Erase this meta and everything will work!

我每次在Facebook上发布文章，显示的都是同一张图片？

这意味着您正在使用“元数据”强制在 Facebook 上发布默认图片。
该元数据类似于 `<meta>`，它应该位于页面顶部的 `<head>` 标签内
。

删除这个元数据，一切就都正常了！