Besides, after the vinegar rice and materials are put out, roll them up a little more, and take the bamboo curtain with you, that is to say, push the sushi away with the bamboo curtain, and then bring the front edge of the bamboo curtain forward after a round, and then push it forward bit by bit with the back, and compact it while rolling. Be careful to press it hard, otherwise it will be difficult to cut and easy to spread.
In fact, I thought the same thing at first, hehe, and then I bought something myself and got it right. You'd better try it yourself and make two.