Which city has a good environment, Luoyang or Haikou?

Haikou has a good air quality and climate, but Luoyang has four distinct seasons and is clean and hygienic. Peony flowers bloom beautifully in the whole city every spring, and the consumption in Luoyang is not very high. To say that the living environment is good, Luoyang has complete buildings and supporting facilities. If I say I like Luoyang, and if I have money, I will buy a house in Hainan and live there for a period of time every year.