What's the difference between commercial and residential buildings and office buildings?

The so-called commercial and residential building is actually a commercial and residential building. General commercial and residential buildings cannot be settled, and the property rights are 40 years. Water and electricity property fees will be higher than ordinary residential buildings, but they can be used for business. Houses are generally civil houses, and the use authority is 70 years. Residential buildings can only be used for living, not for commercial purposes.