Sun YiRang, a Chinese philologist in the Later Qing Dynasty, was the pioneer of ancient character study and textual criticismin 20th Century China. His most important works are Mozi Jiangu, a corrected, definitive edition of Mozi, and Zhou Zhengyi, an important commentary on the Rites of Zhou. He also contributed to the studies of the bronze object and oracle script. His work Qiwen Juli, published posthumously by Luo Zhenyu, was the first work of decipherment of the oracle bone script.