 These represented the different schools that they belonged to, and their robes ranged widely from red and ochre, to blue and black.Between 148 and 170 CE, the Parthian monk An Shigao came to China and translated a work which describes the color of monastic robes used in five major Indian Buddhist sects, called "Da Biqiu Sanqian Weiyi" (Ch.大比丘三千威儀).