Modern Chinese historian, professor at Tsinghua University, specialist in Northern-dynasties social history and popular Buddhism. Author of Wǔliù shìjì běifāng mínzhòng fójiào xìnyǎng 五、六世紀北方民眾佛教信仰 (1998), the standard study of stele-Buddhism and lay devotional culture in 5th–6th-century North China. Edited the apocryphal Fó zài jīnguān shàng zhǔlěi jīng KR6v0054 and Rúlái zài jīnguān zhǔlěi qīngjìng zhuāngyán jìngfú jīng KR6v0055 for Zàngwài fójiào wénxiàn vol. 4.