Looks like the producer of this drama created this cliffhanger ending to tease the audience of a possible Dance of the Phoenix Part 2.

Will Feng Wu(Meng Yuan) go back to her own world or will she live out her life as Feng Wu? Or perhaps finds out that she is the reincarnation of Feng Wu? Or perhaps meet a lookalike Jun LinYuan in her modern world?

Whatever the reason is, I found the ending too abrupt and definitely not good.

Would suggest they come up quickly with a short continuation series to put a better closure.