
If you have no strong preference when Qi Shan offers a weapon, Panacea Fan is the most forgiving pick because it gives ranged attacks and healing. Your default Nameless Sword remains a capable damage weapon and later forms the Bellstrike - Splendor path with Nameless Spear. This is not a permanent lock: all starting choices can be obtained later, and weapon enhancement belongs to the equipped slot rather than the individual weapon.
Safest first pick
Panacea Fan for ranged healing and recovery
Ready DPS base
Nameless Sword is unlocked by default
Low-regret rule
All choices remain obtainable later
Qi Shan gives one weapon after you submit your first Oddity. Vernal Umbrella is the unusual choice because its later route requires Kaifeng, while the other listed starting options can be found in Qinghe. Pick it early only when you specifically want its ranged control style; otherwise Panacea Fan adds more immediate safety.