Attached below is a situation that no one, except extremely selfish politicians, wants to see it happen .  However, the avoidance of it necessitates the collective intelligence of all islanders.

为防大陆攻台，“台独”开始盘点防空洞了！ - 西瓜视频 (ixigua.com)   

PS  When I was young once I lived in a Japanese-style house with an air-raid shelter in its backyard.