More than 400 years after Catholicism was initially introduced into China by the turn of the Ming and the Qing Dynasties, now the masterpiece by Thomas Aquinas from the thirteenth century is finally translated in to Chinese, which is nothing less than an epochal event. Titled as ”Summa Theologica,” this work is ”an inquiry of the knowledge about God,” focusing on the fundamental faith of the church. The ”sacraments” are the cornerstone and attachment of the fundamental life of faith in the church, and Aquinas addresses this topic in depth. This is not only an excellent part of Summa Theologica but also an important exemplar and source for the future generations in their research and development of ”Treatise on the Sacraments.”