Who is Wenchang Emperor on Sansheng Stone?

According to the relevant information of Donghua, when Emperor Wenchang was in the Three Saints, Bai was the Emperor of Donghua. In to the sky kingdom, Jiu Feng heard that Donghua had erased his name on Sansheng Stone, so there would be no marriage, so he cut off a fox's tail and insisted on carving Donghua's name on Sansheng Stone as a document. Jiu Feng's marriage on Sansheng Stone is Wenchang Emperor, but actually Donghua. To the sky kingdom is a fantasy drama in ancient costume, directed by Lin Yufen, starring Yang Mi and Mark Chao, and starring Ken Chang, Dilraba, Vengo, Maggie Huang, Vin, Yu Miao, Liu Ruilin, Wang Xiao, Zhu Xudan and Dai Si, especially Lian Yiming. Based on Qi Tang's novel of the same name, the play tells the story of Bai Qian, the princess of Qing Dynasty, and YeHua, the prince of Nine Days, who finally got married after three love-hate entanglements.