Pīnyīn is the mark of Chinese pronunciation system. It was published on February 11th, 1958, and it includes 22 initials, 39 finals and 4 basic tones. In this course, it will only take us about 1.5 hours to learn the Pīnyīn system.There are three sections in this course. In section one, we'll learn Pīnyīn and tones one by one. In section two, We' re going to practice Chinese pronunciation with 160 useful words. In section three, we'll learn 20 useful sentences like greetings and shopping.