You can get over 30 Valberries in this area.
You can purchase Valberries from Botanist Chloris. The refreshes every 3 days and the items don't change. oou can't see her at night.
Puzzles, Secrets, and Hidden Chests in Liyue
Lisa
Liyue Side Quests, Guides, and Locations
Xinyan
How to Farm Weapon Ascension Materials
Prototype Archaic
Lithic Spear