This book is a first academic publication in English about life and works of Russian Orthodox scholar and Head of Beijing Ecclesiastical Mission Archimandrite Peter (Kamenskiy). He served as scholar and missioner in Beijing over 25 years in 19th century. This book tells about his missionary efforts and academic works, contributed to Sinology. The book may be interested for sinologists, historians, all, who would like to know more about Orthodox Church in China and Sino-Russian relations.