Luoyang - Luoyang Lotus Lantern

 While traveling to Luoyang, you can check out their Lotus and Lanterns to get some small rewards. 

Each box has 5 small Lotus. Talking to them will ask you random questions. Just answer them to get the reward. If you get one wrong, just talk to it again and take another guess.

Once you've completed the five, it will transform into a big Lotus. Then you move on to the next one. There are four in total.

Then time for the Lanterns

Pretty much the same as the Lotus, just answer the story-related questions from them to get some rewards.

Done!

I'm not sure if these are part of a bigger quest. I'll be back here after doing few more research. Let me know as well if you know what's next after doing these Lanterns and Lotus