我将其他CMS的帖子添加到我的新word press网站。对于我更改的特色图片，wp_post 表格组件

post ID: 2300

Attachment in "wp_post":

ID:3400
post_type: attachment
post_mime_type: images/jpeg
post_parent: 2300
post_title: file name
post_name: fileName-in-WP-Content-upload
post_status:inherit
guid: site.com/upload/oldImages/fileName-in-WP-Content-upload.jpg

Making Featured image in "wp_postmeta"

post_id:2300
meta_key: _thmubnail_id
meta_value: 3400

echo wp_get_attachment_url( get_post_thumbnail_id(3400) );