Yup, I have just read the last chapter of the novel. It has an open ending, they're together but Song Li Qing refuses to marry again, so they are somewhat like lovers with no official label.
Liqing knew he married to pei xingxu. He accepted him as husband and father to his son. The only he was under hypnosis when someone (hu'nuer bro) puts spell on him making he wants to make love to xingxu (didn't make it since ML interfered). And xingxu didn't want to force liqing either so yeah.. the ending also shitty since liqing left his husband to follow another guy (Shitty ML) and husband (xingxu) die tragically. Wth with the end ending.. even liqing and ML didn't remarried they still do what a couple do. Well yeahhhh i regret reading this. Poor xingxu ..
Well, at least Li Qing really said he will only have 1 wedding in his life, he will be wed to Pei Xu but he'd be unconscious and would be controlled by somewhat a curse or spell, or hypnosis. They will be okay but am really not sure if that implies he will be married to the shitty seme again. Gotta read it back to make sure