Dongming Caotang, after entering the Tianyi Pavilion, took the lead to see this inconspicuous small courtyard, compared to other monuments in the Tianyi Pavilion, it is really small and low-key, but it is the predecessor of the Tianyi Pavilion. Speaking of, Dongming Caotang is the earliest private collection of books in China, and Tianyi Pavilion has evolved from Dongming Caotang.