No. According to the information on the official website of Zhang Nainai’s sea cucumber, as of August 1, 2023, Zhang Nainai’s sea cucumber has not been listed on the stock exchange. Grandma Zhang Sea Cucumber, founded in 1958, is a sea cucumber brand founded by Grandma Zhang of Dalian. It is mainly engaged in the sea cucumber industry chain integrating free-range sea protection, production and processing, and terminal retail, creating a "whole industry chain" model and integrating " "Research, production and sales" are highly integrated. From the source to the end, Grandma Zhang's sea cucumbers are strictly controlled in every link.