Typha latifolia, commonly known as grass bud, is the tender stem of Typha latifolia. Typha has a banquet history of more than 2,000 years in China, and there is also a record of "Pu Fu" in Zhou Li. Gu Guo in the Ming Dynasty said in a poem: "A crisp piece of Pu Cai is fresh and tender, and the whole plate is full of fresh memories of carp fragrance." "General cuisine is the best in the world, and it is unique in ancient and modern times."

This is a folk song circulating in Huai 'an, Jiangsu Province, which originated from a touching legend left by Liang Hongyu, a famous anti-gold star in the Southern Song Dynasty. Five years after the establishment of Yan in the Southern Song Dynasty, 100,000 elite soldiers of Jin attacked Huai 'an, and Liang Hongyu led the troops to guard Huai 'an, and was besieged by nomadic people for a long time. In the absence of food and grass inside and military aid outside, he happened to find that horses ate cattail stalks, so he used cattail instead of grain to solve the food shortage. In the end, Qi Xin, the army and the people worked together to defeat the nomads. Therefore, Huai 'an people also call cattail "anti-gold dish". Since then, eating Pu cuisine has been widely popular in Huai 'an. Nowadays, Pu cuisine has not only become an indispensable main course in local banquets, the so-called "nothing without Pu", but also has gone out of Huai 'an and entered large and medium-sized cities such as Shanghai and Nanjing.