As a specialty of Kunming, Yunnan, crispy bread is actually found in Jiangsu, Zhejiang and Shanghai. I have seen one in Hangzhou, but it may be that the local dumplings and soup dumplings in Jiangsu, Zhejiang and Shanghai are so deeply rooted in people's hearts that everyone has a weak sense of identity with crispy bread that it is difficult to accept it at once, so merchants are generally reluctant to sell products on this basis.