As shown in the picture, this is Chen Liang's untitled music score, which is the fourth product of 23456 strings in the standard tone sandhi segment. How to play this 2-0 hook string?

You didn't watch the video. Andy used this technique in his masterpiece before, and Chen Liang also used it in Untitled. The key here blocks your hand from playing after the fourth fret, but suddenly you need the second fret hook, and your hand has to reach the second fret in front of the key to hook the line, so the left hand written here is reversed (which may not be very suitable). That's what I'm saying. I don't feel anything. You'll understand after watching the video. I said hook, but the hand should go around the front of the mixer sandwich.