etrang
I think you need to do a little more research regarding the chronic electrical power shortages and outages on the mainland, particularly in the Pearl River Delta region. Power outages are averaging twice a week lasting several hours at a time.
Most of the mainlands electrical power comes from coal fired power stations. Most of these power stations use poor quality local coal which is higher in sulphur content and they also lack completely the particulate separators and scrubbers which are mandatory in most western countries.
Most people living in the Pearl River Delta region actually heat and cook their dwellings with coal fired heaters and stoves. There are two reasons why they have to do this. The first is they couldn’t afford the power and the second is there isn’t enough electrical power supply to provide them all with this luxury even if they could afford it.