Both of their vows together. The audio is from the Chinese voice actors of Jinghua and Xi - Li Laning, Liu Mingyue

Jinghua: I, YangJinghua, voluntarily wants to become the 63rd Yangmingsi, Duanmu Xi’s spirit shadow. With the spirit binding rings as the contract, living with shared spirit, accompanying each other, until death. Or else, never to be separated.

Duanmu Xi: Let’s make our vows, Jinghua. From today onwards, your misery, happiness, everything. I accept all of it.