May I ask the three great books are those three great books

The Three Great Books are The Letter of Fu Lei, The Letter of Zeng Guofan, and The Advice of a Lifetime.

"Fu Lei Family Letters" is China's literary and artistic translator Fu Lei and Mrs. Fu Lei between 1954 and 1966 to write to the children Fu Cong, Fu Min's family letter excerpts, the book is an excellent young people's ideological cultivation of reading materials, is the classic model of quality education, is full of fatherly love of the teaching of children masterpiece. Zeng Guofan Family Letters is a collection of Zeng Guofan's letters, written in the middle of the 19th century. Zeng's family letters are written in a calm and free form, and they are written in a way that is easy to think of and free to write, and they contain true knowledge and good words in the plain family life, and they have strong persuasive and inspirational power. British diplomat Lord Chastainfield wrote his son's "Advice for a Lifetime" is a model of Western aristocratic education, known as "cultivating the most outstanding young people,