"It all started with Zhao Feiyan's family. Zhao Feiyan's father, Zhao Lin, was a slave in the Han Dynasty palace and lived in poverty. After Zhao Feiyan was born, her father threw her out into the wilderness because he couldn't afford to raise her. Zhao Lin dreamed of the baby crying at night, and when he went to look for her four days later, the baby was still alive. Zhao Lin took her home again and barely raised her. Because of her family's poverty, Zhao Feiyan was sold at a young age to Princess Yanga's family to work as a kabuki dancer. Zhao Feiyan was very clever and developed a charming singing voice and excellent dancing skills." "When Zhao Feiyan first met Emperor Chengdi of Han Dynasty, in order to hide the fact that she had had skin-to-skin contact with Marquis Fuping Zhang Fang, she purposely chose the time of her menstruation, pretending to be a person who did not understand "human affairs" and was not able to win the affectionate look. So that the emperor felt fresh, like crazy in the gelatinous shoulder bite a few bites, teeth marks to the months do not fade. Even better is Zhao Feiyan's body blood stained the imperial robes, she wanted to wash for him, into the emperor looked at those blood stains in a daze, said to stay as a permanent souvenir, poor and laughable Han Chengdi even "this blood" as "his blood", see Zhao Feiyan camouflage means is how to The first time I saw it, it was a very good one. " quote wikipedia, if you want to understand on baidu wikipedia