looni's feed

For everyone confused about the time skip with adult He Tian and Momo, I think the author has insinuated that He Tian comes and goes for long periods away from Momo (i.e the past christmas chapter when Momo was working at the restaurant; now working at a car shop etc), probably due to his brothers/family business . Momo doesn't seem to ever know how long he'd be gone for or for what. He Tian just leaves and pops back up when he can to see Momo. Momo is grumpy because he misses him and it obviously hurts to see He Tian there one minute then disappear for who knows how long. All he can do is wait for him.

As for Jian Yi and Xixi, it looks like the most recent update seems to be a bit after their reunion as adults as well, and getting back into the familiarity and the continuity of their relationship. Hence why Jian Yi commented on how Xixi's sister has grown.