One obvious social change event in my memory is the popularization of mobile payment in Jiangsu. With the widespread use of Alipay and WeChat Pay, people's lifestyles have changed a lot. Whether in supermarkets, restaurants or small street shops, most people seldom use cash. This change has improved the efficiency of life and also changed people's views on money and consumption methods. At the same time, the elderly need to learn new technologies to adapt to this change, which also makes me realize that social changes will have different impacts on different groups.