In Beijing, you can buy traditional vertical books on major e-commerce platforms or physical bookstores. For details, you can refer to the following suggestions: 1. Jingdong: Jingdong is a well-known e-commerce platform with several branches in Beijing. You can search for relevant keywords such as "traditional vertical book" or "Taiwan book" to find suitable books and buy them. 2. Taobao: Taobao is also a well-known e-commerce platform with several branches in Beijing. You can search for "traditional vertical books" or "Taiwan books" on Taobao to find suitable books and buy them. 3 Dangdang: Dangdang is one of the larger online bookstores in Beijing. You can also search for relevant keywords such as "traditional vertical book" or "Taiwan book" to find suitable books and buy them. In addition to the above e-commerce platforms, some large bookstores in Beijing also sold traditional vertical books, such as Beijing Book Building, Ji Feng Book Garden, etc. Before purchasing, one could check the bookstore's inventory and reviews to choose a suitable book.