鲁迅日记和鲁迅的书信中都提到过和任国桢的联系。任国桢早年是北大的学生 ,学俄文的。大革命时期就在北大从事党的工作。当时北方党组织的负责人是李大钊同志 ,他的公开身份是北大的教授。为了开辟党在东北的工作 ,一九二三年至一九二五年 ,李大钊同志先后派吴丽石及任国桢同 Both Lu Xun’s diary and Lu Xun’s letters mentioned the connection with Ren Guozhen. Ren Guozhen was a Peking University student in his early years, learning Russian. During the revolution, he was working in the party in Peking University. At that time, the person in charge of the Northern Party Organization was Comrade Li Dazhao, whose public identity was a professor at Peking University. In order to open up the party’s work in the northeast, Comrade Li Dazhao successively sent Wu Lishi and Ren Guozhen from 1923 to 1925