Whatever you say,
You might want to consider Shenzhen, next to Hong Kong, or maybe Sanya, or even the original city I posted, Hong Kong. Nanning, Haikou, even Xiamen.
A lot of Southern China is like Hawaii - you don't really need a furnace or heater. If it's cold - a most a half dozen days of the year - you wear extra clothes. Consider that Southern China is right in line with Northern Philippines - it's balmy year-round.
That said, all the places I've been to in the East and North of China - Shanghai, Dalian, Beijing, Nanjing, Suzhou, Wuxi and many more - heat is available in apartments and houses.
Oh, and they have plumbing too...