 His numerous publications in the Harvard Journal of Asiatic Studies included investigations of historical linguistics as well as Han dynasty bronze TLV mirrors, female rulers, hostages, the ancient game Liubo, and schedules of work and rest in imperial China.Yang’s diaries reveal that in the 1950s he felt doubtful of many foreign scholars, wary of Fairbank’s political skills and Benjamin Schwartz’s generalizations.At times his mental condition was not good, and he was even given electric shock treatment An attempt by his friend Ho Ping-ti to arrange a move from Harvard to University of Chicago did not work out.