non-commercial housing. Shenzhen's residential bottom business policy stipulates that Shenzhen residential buildings and the houses planned for commercial purposes on the ground floor of residential buildings shall not be used as places for catering services, song and dance entertainment, and Internet access services. Commercial housing refers to the houses operated by qualified real estate development companies (including foreign-invested enterprises) after obtaining the land use right through transfer under the conditions of market economy, all of which are sold at the market price.