Fixing Markdown Rendering in Typecho Posts Published via MWEB or Other Blog Editors

I recently tried using mweb to edit my blog and publish posts remotely to this typecho site, but found that Markdown wasn't automatically rendered when I published. I had to go into the admin panel and publish the post again manually.
I searched Baidu but found no solution. Then I discovered a setting myself, so I'm sharing it here.
Go to Dashboard - Personal Settings

Writing Settings

Just enable this option.