1) Some McDonald's restaurants in Fuzhou are open 24 hours a day (such as Jintai Road McDonald's and Shudou McDonald's). You can spend the night there. There is air conditioning in summer and heating in winter. Many nightlife people go to McDonald's for a midnight snack, so it's not cold even in the middle of the night. And wireless networks.
2) You can also choose a massage or sauna place. At present, many massage places provide services similar to hotels, massage+accommodation+buffet, and of course the price is not limited to 100.
Supplement: Jintai McDonald's is closed today.
It depends on your needs.