Huo Guang
The cases of Huo Guang, who served as regent of the Western Han, and General Liang Ji, who dominated the government of Han China in the 150's, are typical of bisexuals whose homosexuality would not have been mentioned had it not been seen as unusual in some way. Huo Guang was infatuated with his slave master, Feng Zidu, a fact that "provoked laughter in the wineshops of foreigners", but which didn't have much effect on his own countrymen. What did surprise them was when Huo Guang's widow took up with the slave master after her husband's death. For two lower-status individuals, one a woman and one a servant, to dishonor their master's memory in this way was considered shocking, and so the relationship was made note of.