“Thien tu van” is one of the most classic books about learning Chinese in the primary stage in China. Since Chinese was promulgated through neighborhood including Vietnam, “Thien tu van” was popularized and became one of the important learning Chinese books for Vietnamese in the ancient times. From the view of writing identity, the writing is about initially researching and finding out popularization situation and “Thien tu van” usage in Vietnam by analyzing writing quantity and writing form popularization in order to reflect aspect of learning Chinese situation of Vietnamese in ancient times as well as contribute reference value for learning Chinese approach of Vietnamese in modern times.