It compiles about 160 letters from the Qing Tao-kuang 30 years to Tongzhi 10 years, in total 30 years. The letters involve a wide range of subjects, from chores and livelihood of families to improving his virtue , refining his achievement and rejuvenating our nation.It vividly reflects his main activities of governing politics, country and academic discipline. The sentences in letters are golden sayings about ideal, spiritual realm and moral training.