1. Porphyra from China is distributed in coastal areas. Porphyra haitanensis is cultivated in Fujian coastal areas and southern Zhejiang, while Porphyra yezoensis is mainly cultivated in the north. Xiapu County, the hometown of laver, is one of the oldest counties in Fujian, and it is also the earliest area in southern China where kelp and laver are cultivated. As early as the Yuan Dynasty, Xiapu people recorded the cultivation of laver, and had the national geographical indication of "Xiapu laver".

2. Porphyra is a general term for alternating algae growing in the ocean. Its general shape is leaflike and its color is dark brown. Laver is also a kind of food in our daily life. The most famous dish made of laver is probably egg laver soup.