I tried electric shopping carts in shopping malls, which have moderate speed and low prices. They can be used for one hour at 10 yuan, which is very convenient. I think this type of small car can be promoted to major shopping malls.Watching large Ro/Ro passenger ships enter and exit the port and turn under the sunset is a beautiful and stunning scene.I did walk a lot, and the smooth journey made me forget about fatigue.Taking time off while busy, I also need to revise my students' papers, w…