Music Theory:

Generally, Li Chongguang’s "Basic Music Theory" is used, which is available in general bookstores.

The Tianjin Conservatory of Music has its own music theory textbook, a red book cover, "Basic Music Theory" by Yuan Lirong

Sight-singing and ear training:

I was, In the bookstore, buy some sight-singing and ear-training exam question sets from previous universities to practice with. This kind of sight-singing and ear-training books are very common in bookstores. The level of sight-singing and ear training in Chengdu does not depend on the quality of the teaching materials, but on your own hard work. Haha~

I wish you good results~ Come on~