Recently we found 25 folios of the so-called Abitaki Uighur text in the Beijing National Library. The word “Abitaki”(<Chinese “Amituojing/Amitaking = Sanskrit Amitābha-sūtra) is used only as a code name written in small letter on the left side of some folios of the manuscript. But it has nothing to do with the famous scripture “Amitābha-sūtra”(one chapter, translated into Chinese by Kumārajīva in the 4th century AD). I hold that it belongs to a lost Buddhist Chinese book called “Da Bai Lian She Jing”(The Great Lotus Society Sutra) consisting of four chapters of the Pure Land Schooland it was copied during theYuan Dynasty (1279-1368). Here I am studying and publishing another two folios (belonging to the 3rd chapter) of the text.