As a person who has only seen the first ten or so episodes but spoiled herself on fanfic:
A. I would say the existence of Ye Zun is a spoiler; Shen Wei's actor playing a double/triple role probably isn't (since the BCE thing is obvious early on, and a general mention of that kind of identity games wouldn't give away more than that.) (Zhao Yunlan is Kunlun with time travel is also a spoiler; that there's some kind of shared identity going on with them obviously isn't.)
B. Dunno, part of the reason I'm only up to episode ten is that somebody told me I wouldn't like the ending, so I'm trying to put off getting to it. :P I think something along the lines of what you said right here is probably fine, though, and gives enough info to let people know if they want to ask about more.
no subject
A. I would say the existence of Ye Zun is a spoiler; Shen Wei's actor playing a double/triple role probably isn't (since the BCE thing is obvious early on, and a general mention of that kind of identity games wouldn't give away more than that.) (Zhao Yunlan is Kunlun with time travel is also a spoiler; that there's some kind of shared identity going on with them obviously isn't.)
B. Dunno, part of the reason I'm only up to episode ten is that somebody told me I wouldn't like the ending, so I'm trying to put off getting to it. :P I think something along the lines of what you said right here is probably fine, though, and gives enough info to let people know if they want to ask about more.