Actually, despite being sad, the ending is truthful. YZJ was beyond cure, his body had been battling the poison…
Exactly if he got cured immediately after getting the antidote that would be super unrealistic and we can tell the writer obviously doesn't want that. The poison is basically a part of him now. We've seen him get dizzy, blurry eyesight and even spitting out blood multiple times.
Would be nice if they explained it in the episodes we've watched, instead of us brainstorming and gathering facts from history lol but hey they're working with a 40 episode limit. Maybe some of your questions will be revealed in the coming episodes. 2. She actually went with two men, one coachman and Yingtao's lover( Forgot his name). He vowed to protect her but got hit first.💀 She didn't want zi jing or jin ran to worry hence she didn't inform them. As for your third question I'd have to rewatch that episode. I've been focused on how this will actually end .
Celebrity 
She's a teacher/lecturer in Almost Lover.
The poison is basically a part of him now. We've seen him get dizzy, blurry eyesight and even spitting out blood multiple times.
2. She actually went with two men, one coachman and Yingtao's lover( Forgot his name). He vowed to protect her but got hit first.💀
She didn't want zi jing or jin ran to worry hence she didn't inform them.
As for your third question I'd have to rewatch that episode. I've been focused on how this will actually end .