换房足指在两户或两户以上的住房之间本着互利、自愿的原则，彼此之间进行的房屋使用权的互换。近年来，北京市的换房市场非常活跃，一方面，居民为了解决居住不便，改善居住环境等问题，存在着较大的换房需求，另一方面，为了满足居民换房需求，为居民提供换房服务的换房中介 The exchange of accommodation means the exchange of housing tenure between two or more than two houses based on the principle of mutual benefit and voluntariness. In recent years, the real estate exchange market in Beijing has been very active. On the one hand, residents have greater demand for housing exchange in order to solve the problems of housing inconvenience and improvement of living environment. On the other hand, in order to meet the demand of residents for housing exchange, Exchange room for the exchange of services intermediaries