Yes Zhu Yuanzhang and Wu Yujiao are real. Wu Yujiao was the daughter of Wu Yun, a senior official at the end of Yuan Dynasty, and the first imperial concubine of Zhu Yuanzhang, the founding emperor of Ming Dynasty. Zhu Yuanzhang (1328,10,21-1398, June 24th), a founding hero of the Ming Dynasty, was named Guo Rui, formerly known as Zhu Chongba and Zhu Xingzong. Li Zhong was born in Zhou Hao (now Fengyang, Anhui). The founding emperor of the Ming Dynasty (reigned from 1368 to 1398) was named "Hongwu".