Lantern Rite 2026 Event - In search of Lang-Gan

The new Lantern Rite event seems to be focused on the new character that was just released named Zibai. There's contrasting info coming from different characters about her origins. Some think she was a contemporary of Zhong Li and she helped him in battle. Some other thinks she come from a precedent era and is actually the "Daughter of Time".
Either way, the only thing that seems to match so far is that she's known as the "White Horse Adeptus from Lang-Gan" and she's heavily present in the legends of Liyue. The whole horse aspect fits with the current zodiac year as from 17 february 2026 we'll be official in the "year of the horse".
Together with the usual gang (Hu Tao, Xiangling, etc...) we're investigating a case of a woman (NPC) going crazy in the middle of the city talking about some relic that she found (she was restrained by Shenhe). This woman belongings seems to lead again to the country of Lang-Gan.
I guess next step will be to try and find the place where to find this country ruins or...maybe we can ask Zhong Li I guess? I mean he should know something about it right?

Last year Lantern Rite was Hu Tao centered and honestly one of the best events we've ever had. The final emotional scenes with Hu Tao are still pretty vivid in my memories. I'm curious to see if this is going to be able to top that.