If there’s nowhere else to sleep, 24‑hour venues can only serve as a temporary overnight stop; shelters should be the first choice

Cost: Waiting areas at airports and train stations are usually free. Fast‑food restaurants and internet cafés require some spending. Sleep is often restless, and there’s a risk of theft. The real challenge is staying awake all night.
In plain terms: Airports and train stations can provide a place to spend the night; they have restrooms and power outlets. Yet no official data confirms they’re safe. Keep valuables close, decline food or drinks from strangers, and avoid isolated corners. It’s unsafe to sleep under bridges, by rivers, or at construction sites at night. Shelters offer free food and lodging — go there first.
Benefit: These venues allow you to get through the night; you’ll have access to restrooms and charging options. No official statistics are available.
Evidence grade: C
Sources:作者经验，无官方文件
Notes: Safety risks are real. Keep belongings on your person, refuse drinks or food from strangers, and steer clear of secluded areas. Never camp out under bridges, by rivers, or at construction sites at night — extreme weather can be fatal. As noted in point 4, shelters provide free food and lodging; make them your priority. Some locations conduct midnight clear‑outs, so avoid confrontations with security staff.