What is the final outcome of Hua Xu's introduction of Rong Yuan? How did you die?

Rong Yuan, the most beautiful man in Zheng State, has a cold face and black eyes like Tang Quan, and he loves him deeply until death do us part. By mistake, I married Yingying in March. He has always been a man who greeted his brother with his life protection. Even if he was poisoned in the end, he would rather die alone in order to protect Yingying's brother. When he died, there were hot springs in the distant mountains, red cherry blossoms flying all over the sky, a gorgeous and desolate funeral at night, and a sea of fire set off his pale and handsome face. He and Brother Ying held a token of love and sank gently and peacefully to the bottom of the water. ...

After meditation, Rong Yuan avoided going to Dongshan Palace to cultivate self-cultivation. The cherry blossoms wither in May. Everything has been written into the history books, and Zheng's era has passed, leaving only two pages of tissue paper for the world. A fire broke out in Dongshan Palace, which not only burned the palace clean, but also destroyed the cherry blossoms in Rongyuan. What is even more bizarre is that the cherry trees planted in Dongshan will never bloom again. Yingying finally chose to stay in Rong Yuan's coffin.