First, prepare a 20CM tie hook and an 80CM string hook main line. I usually use the line 1.5 to tie the hook 2.0 or 2.5 as the main string hook, and use the No.4 and No.5 Yi Shi hook as the hook.
It's probably just a figure-of-eight knot wrapped around a little more and tied down in turn. I usually tie three hooks.
If you don't understand, please look at the picture below: