Vampire, not zombie.
No, it's actually a zombie, not vampire. People really only call it a vampire because it sucks life out of people rather than eating their brains. Being Taiwanese, I can tell you for sure that Chinese and Taiwanese people consider them zombies and not vampires.
"Zombie" in Chinese is "殭屍 (stiffed corpse)," while "vampire" is "吸血鬼 (blood-sucking ghost)." The actual term for Western zombies in Chinese is "喪屍,", but as far as I'm concerned, almost everyone uses "殭屍" instead when referring to the former, so it has become a catch-all term for both Western and Chinese zombies. Even Google Translate translates both those terms into "zombie." This is also why the fandom often portrays Yoshika as a Western zombie.
Anyway, the question...
This may be proof that buildings in Gensokyo have souls.
What if Cirno finds a functioning bomb buried in the ground and kicks it for the lulz?