可以通过系统在网上购买自己需要的农产品，例如：大米，土豆等等，可以查询最近一段时间内哪种农产品的价格有优惠，方面用户了解到最新的信息。-Can be purchased online through the system to their own needs of agricultural products, such as: rice, potatoes, etc., you can check the most recent period which have preferential pr