This cache is NOT at the posted coordinates. Please complete Adventure Lab "[TW25] National Railway Museum 國家鐵道博物館" (Open: Tuesday-Sunday 09:30-17:00, free) to get solution to this bonus cache.
Answer: ABCDEFGHIJKLM
You can validate your puzzle solution with
certitude.

The cache is one of the listings of Taiwan Geocaching Party 2025 that takes place on 2025-10-10.
Thank 2022claire, edgehung, littlepuputing, seanliu1, Spicemama, stacyhsu, chentg for FP given.