he history class i like most is about science history. i always think that science is so magical that it change the world,such as the internet making the life and work more convenient, the discovery of DNA making the human beings more understanding about our bodies, the fasting developing technology making our daily life more Intelligent. since the dicovery of the app named zhifubao, the life of our chinese changed so qulckly . we can shopping in nearly all stores with out ciret cards or cash scaning the Barcode Pay.