我和外国人的接触较少，留学日本二年，没有一个日本朋友。解放后因在北京大学指导外国研究生，有可称为朋友的两人，因为国际情况关系，都好几年没有通信了。一个是捷克人鲍格洛（Timotrus Pokora），他跟我两年，研究《桓谭新论》（汉代思想家），回国后常常给我写信，把他的 I had less contact with foreigners, studied in Japan for two years and did not have a Japanese friend. After the liberation, because they were guiding foreign graduate students at Peking University, there were two people who could be called friends. Because of the international situation, they all had no communication for several years. One was Timotrus Pokora, a Czech man who followed me for two years and studied “Huan Tan’s New Theory” (Han Dynasty thinker). After returning to China, I often wrote to him