Also China's population are moving from the frozen north to the warm south, construction standards are increasing (better insulation), cooking is being outsourced (fewer kitchens), and they lead the world in mass transit / ride hailing / vehicle sharing / portable e-vehicle (scooter/wheel types). China has possibly reached peak personal vehicle. Local governments frequently spray water along main roads to bring down air pollution levels - surprisingly effective for PM2.5 - and most cities are pushing industrial land use far out of town.