Who was the birth mother of Prince Yingsi of Great Qin

Crown Prince Yingsi was born to Duke Xiao of Qin and a maid who was a few years older than him. The maid, named Cai Sang, suddenly disappeared a month after giving birth to Win Donkey. She left a white cloth next to Yingsi and wrote eight big characters in blood ~ ~ ~ suffered from internal diseases, far away from the mountains and forests. Never came back. Yingqu Liang, who had just learned about personnel affairs, was very angry, believing that Cai Sang was a ruthless and unjust woman, and it was not until she was crowned an adult that Yingqu Liang understood the pain of the beautiful maid.

The old Qin people were simple and wild, and the illegitimate children inherited the great cause as usual, but there was a lot of criticism of their mother. If Cai Sang remained in the palace, the notoriety of seducing the crown prince could become a fatal pit for his son at any time in the court entanglement. Leave categorically, a hundred, isn't it a very clever strange woman? Since then, Yingqu Liang has suddenly woken up and stood up in anger, although he has not been married after he has been married!