Some units have heating, which is estimated that many people can't enjoy; Many units and rich people use air conditioners, but they don't care about spending money anyway; Most people use electric stoves, and a few people play mahjong around, which is comfortable; Students can use hot water bottles and run with them. Some are worse. If it is cold, take a hot bath or soak your feet. There are even worse (I mean normal people), who don't get up all day and lie in bed eating and drinking Lazar; Worst of all, I went to the unit boiler room for the winter. ...