“根据建设部和北京市的有关房地产法律法规的规定,进行商品房买卖的双方应签订‘房屋买卖(预售)合同’,该合同的示范文本由北京市房屋土地管理局制定,目的是保护消费者权益和确保公平交易。”周律师在他的办公室对敏小姐说。 According to the provisions of the Ministry of Construction and Beijing on real estate laws and regulations, both parties should sign a “sale and purchase agreement (pre-sale) contract” and the model text of the contract was formulated by the Beijing Municipal Bureau of Land and Housing with the purpose of protecting consumption Equity and ensure fair trade. "Zhou lawyer in his office Miss Min said.