[SOLVED] what type of link is it?

Documentation says:

Link

There are two types of links in the document content:

Standard URL hyperlinks, opened with a browser, used for Internet resource access

The content block link established by ref is used for two-way linking within SiYuan

My question is what kind of link is this marked by number 1

https://i.imgur.com/3DQUu5e.png

And how to make it? When I do Ctrl+click on it, it opens pop-up,

2 = search result

3 = reference

I learned how to use copy block reference, copy block embed, copy block hyperlink (markdown). It behaves similar to pasted block hyperlink (markdown) but it looks diffrent:

https://i.imgur.com/5brGPHz.png