The Book of Documents was the subject of one of China's oldest literary controversies, between proponents of different versions of the text. A version was preserved from Qin Shi Huang's burning of books and burying of scholars by scholar Fu Sheng, in 29 sections (pian 篇). This group of texts were referred to as "Modern Script" jinwen 今文, because they were written with the script in use at the beginning of the Western Han dyansty. According to Western Han dynasty documents, new textual material was discovered in the wall of Confucius' family estate in Qufu by his descendant Kong Anguo in the late 2nd century BC. This new material was referred to as "Old Script" guwen 古文, because they were written in the script that predated the standardization of Chinese script enforced during the Qin dynasty. Compared to the "Modern Script" texts, the "Old Script" material had 16 more texts. However, this seems to have been lost at the end of the Eastern Han dynasty, while the "Modern Script" text enjoyed circulation, in particular in the Ouyang Shangshu (歐陽尚書). This was the basis of studies by Ma Rong and Zheng Xuan in the Easter Han dynasty.
