Many, China Bookstore is the first in Chinese mainland, from Laozi, Zhuangzi and Liezi to Wang Bi and Bao Puzi, and then to Liu Wendian and Chen Guying (these two are Taoist studies) (see the picture below). Sanmin Bookstore recommended by Hong Kong and Taiwan is a bit expensive. I once bought a book with a page of 120, KJV's theory of sitting and forgetting, and JD.COM sold it to 48 yuan.