According to historical records, the real Princess Zheng in Gao Changgong should be Princess Lanling. I don't know her origin. It is estimated that she should be the daughter of a minister surnamed Zheng in North Korea.
In addition, Gao Changgong also has a concubine room, surnamed Wang, which was given by the king of Northern Qi Dynasty.
Supplementary history:
Gao Su, the king of Lanling, is a filial, long and respectful man, the fourth son. Reluctantly moved to the state secretariat. The Turks entered Jinyang, and the long-term workers tried their best to strike it. After Mangshan was defeated, Longbow was Zhong Jun, and he went to see Zhou Jun with 500 troops. Then I went to Jin Yong and was besieged. People in the city are well informed and respectful, and avoid showing their faces. They were rescued by the crossbowman, so they won a great victory. Samurai ballad is also called "Samurai Lanling enters the array". Lisi, Zhou Mu and Qingying are rich in goods. Later, it was Qiu. Discuss with Duan Shao about Baigu, and then attack Ding Yang. When you are sick, you will always respect. Before and after the meritorious service, no county officials such as Julu, Changle, Leping and Levin were appointed.
Please adopt it. thank you