Like I mention earlier probably it's reboot and China promote them like that
Yeah. Ex wife stop was also the same. They added 2nd season name to the title, but at the end it was another story. Or rather like a remake. And I think here it's the same situation.
do we need to watch mysterious love in order to watch this??
It's hard to say, because many times, even if something is promoted as second season, it's more like a hmm reboot? of the original title...and looking how story is described, that might be the case, so probably you will not need to watch the first one, but will see, when it airs :)
Main network is CCTV , so far it's how it was annouced, and they are mostly promoting after current show their air, will end. So it's how they plan to air it, will see how it will end. But it's one of those titles, which was planned to air in April from late Feb, so it's possible.
gosh, this was filmed in Jan 2017. It took over six years to be released?!
You should at this point know, how it is with China. Few days ago aired drama, which was waiting 12 years to be released, and we have more like those in DB, which still didn't aired after many years. It seems they cleaning some basements hard this year, and maybe also because pandemic hits, not much was filmed still, so they use the old ones, to add something to the slot, because we also have a lot of reruns.
1 
4 
1 
https://www.youtube.com/results?search_query=%E6%B7%BB%E5%8A%A0%E4%B8%80%E9%BB%9E%E6%84%9B%E8%88%87%E4%BD%A0
And the same situation is on Douyin, which is the original network. If someone can find more episodes, please edit it , to the correct no :)