Here's a test of internal_link, and notes you should to know

Because my usual notes are organized in the Evernote software, which can share the content by sharing links, so it is very convenient to use external_link, and transfer notes is a huge project, and it is not convenient to organize and categorize here, In the future, I may purchase a domain name and server and build a personal homepage with tools like WordPress to make it easier to categorize. Even used to replace the Evernote, in order to share more easily.