规则没有任何变化。我把规则放在错误的目录中。网站根目录不是域根目录，它位于子目录中。使用IIS，您需要将 web.config 放在要重写URL的同一目录中。

Nothing changed on the rule. I had the rule in the wrong directory. The website root was not the domain root, it was in a sub directory. With IIS you need to have the web.configin the same directory that you are wanting to rewrite the URL.

经过几个小时的敲打，我终于明白了。

After several hours of banging my head I finally figured it out.