Unable to answer "What kind of fire hydrant is this?" – 有0902 (Fire Hydrant) – https://osm.org/node/7136864562 via StreetComplete_ee 59.2:

有牌子，但沒看到，連地下消防栓的蓋子都沒看到

Attached photo(s):
https://westnordost.de/p/252863.jpg