Why is the weather in Fuzhou so hot?

I am depressed, too. It would be silly to go out after cram school. I think it has something to do with the basin topography in Fuzhou. Air does not flow easily. Heat does not dissipate easily. That's why I still feel bored when I go out for a walk at night. I think so, too, plus the urban heat island effect. So it's hot. But there is nothing wrong with blowing air conditioning at home.