国产欧美精品一区二区,中文字幕专区在线亚洲,国产精品美女网站在线观看,艾秋果冻传媒2021精品,在线免费一区二区,久久久久久青草大香综合精品,日韩美aaa特级毛片,欧美成人精品午夜免费影视

With the continuous development of science and technology, the continuous increase in manpower costs, the traditional sales method is about to change, and the unmanned sales model will become the key to improve sales competitiveness in the future. Based on the rise of mobile payment methods, people"s payment methods have been changed. In the future, this payment method will be the mainstream payment method for the unsold model. It is therefore necessary to revisit the new unsold goods system based on mobile communications and mobile payments. What kind of wireless communication technology has become a key factor in the study. The performance analysis of several wireless communication modes is carried out through experiments. Finally, it is determined that GPRS communication method can be used to realize the reliability transmission of information.