First of all, running 5 kilometers on the treadmill is equivalent to running about 2 kilometers on land. Treadmill drives people to run. Runners must work hard to advance. As far as the effective use of time is concerned, you can't run as fast as on the road, and you can see different scenery along the way. There are no time and geographical restrictions. In addition, there are many major running groups on the road. Running together is easier to cultivate running enthusiasm.
If you have money to buy running shoes, you can go to Anshi, Mizuno to study the quality of running shoes, and then Adi will become a big name. The one with high cost performance is Decathlon.