Published by Shanghai Da Zong Shu Ju, this primary school textbook imparts skills of letter writing such as style, expression and format. Letters were the main form of communication in the past, and textbooks such as Correspondence aimed to teach students this skill. This skill was especially important in overseas Chinese communities as letter-writing was instrumental in allowing them to maintain ties with their relatives in China.Beautifully illustrated on each page, the content of this textbook also highlights the political situation in China as some of the model letters mentioned the movement to boycott Japanese goods.