"Legend has it that a deep, pure affection filled this ancient garden, creating the Luhua Pool as it is known today."

Source: https://gamerant.com/genshin-impact-beautiful-locations/

Use the Statue of the Seven that’s southeast of the Luhua Pool and farm some extra Qingxin in one other round method.

Source: https://www.mccourier.com/where-to-find-qingxin-flowers-in-genshin-impact-locations-and-farming-routes/