Is it legal to sell only property and not rent underground parking spaces?

Legal. According to the French Open, generally speaking, parking spaces in residential areas are divided into commercial parking spaces and civil air defense parking spaces for civil air defense projects. Commercial parking spaces can be sold or rented, while civil air defense parking spaces can only be rented and transferred, not sold. The ownership of commercial parking spaces belongs to construction enterprises, and they can freely decide whether to sell or rent commercial parking spaces, so it is legal to only sell underground parking spaces of properties.