This study examines the aspect of the 'replication and variation of Buddha statues in medieval China' by focusing on the Asokan statues, which had a large number of replicas in China from the 6th to the 8th century. It aims to identify the standard form of the statues through extant artifacts and textual records, and considers the role of illustrated texts written by Buddhist leaders such as Daoxuan(道宣) in disseminating the standard form. The establishment of the standard form was made possible by the existence of the original image in Chang'gansi(長干寺) Temple. The standard form of the Asokan statues, which was estimated through analysis of written records and artifacts, is as follows: He had a beardless face, a sturdy and imposing body, and was dressed in an Indian-style robe that covered both shoulders, with a U-shaped fold. His two hands were raised in front of him, with his right hand presenting the Abhaya mudra and his left hand holding the hem of the robe. Therefore, exceptions such as the mustache seen on the images excavated in Chengdu(成都) are variations of the standard form. Asokan statues, depicted in Cave 323 of the Mogao Grottes in Dunhuang, is wearing a robe with the right shoulder exposed and left hand down, which differs from the standard form. The appearance of this variant suggests that the statues in Cave 323 were based on texts from the Dunhuang and elsewhere, rather than from a centralized source. While the Tang dynasty attempted to achieve Buddhist cultural unity through a centralized political system, local cultural traditions that differed from the center were strongly maintained in Dunhuang.