What is the binding method of the eight-character ring and the sub-line?

First, the first step is to tie one end according to the simple method of tying the fish hook.

The second step is to fold the fishing line in half.

Third, the third step is to fold one end of the line through the eight-character ring.

Fourth, the fourth step is to wrap the thread around a circle to form a knot.

Fifth, the fifth step passes through the middle of the two strands of the folded thread.

Sixth, pull hard after passing through.