The book gives readers specific and detailed perspectives on the missionary process of Western missionaries when they arrived in Vietnam and China during the 16th - 18th centuries. How have the religious orders with the mission from the Holy See influenced the classes and people's lives of the two countries Vietnam - China? What is the attitude of the ruling classes of the two countries towards this new type of religion? For or against? All have been clearly mentioned in this book by Dr. Truong Anh Thuan. Besides, why do missionaries choose fields of science and technology such as astronomy or medicine to "befriend" with the ruling authorities of two countries, Vietnam and China? Is there a political purpose or simply out of a desire to borrow power from them to carry out the process of "Christianization"? Readers, let's learn more about the publication to get the most accurate answer!