it's always harder to reform yourself than to forbid others to come. This sentence means that people always talk about others, but they don't see their own faults, even if they realize their own faults, which is Mr. Lu Xun's irony and disappointment in the dark society. Lu Xun, whose real name was Zhang Shou, whose first name was Yushan, and later was Yucai, changed his name to Zhou Shuren. When he published his first vernacular novel Diary of a Madman in 1918, he began to use "Lu Xun" as his pen name, which had a great influence on the social, ideological and cultural development of China after the May 4th Movement and was known as "the writer who occupied the largest territory on the cultural map of East Asia in the 2th century".