Preface: to be translated into Chinese
Langlands 纲领和他的数学世界 (Langands program and his mathematical world) . (2018, written 2016) 49--88.
Editorial Comments: This essay was written in 2016 and published in August 2018 in the book Langlands 纲领和他的数学世界. (Langlands program and his mathematical world.) The essay appeared in English and was also translated into Chinese.