If you look at the top of your phone, you'll usually see a small symbol that shows 3G or 4G. The "G" means the "generation(代)" of your mobile network. But they will become history after 5G network fully arrives.
In recent years, China makes great achievement in 5G network. Now it's making efforts to popularize the business use of 5G. Shanghai is the first city in China to start testing 5G networks. On March 30, 2019, Wu Qing, one of the leaders of Shanghai, made the first 5G video call with Huawei Mate Smartphone.
5G allows people download and upload data faster than ever before. It is 100 times faster than 4G mobile network. But 5G doesn't just bring faster mobile Internet. People can use it for many other things as well. For example, 5G can make self-driving cars safer.
Today's self-driving cars have one problem—time lag(滞后). When a self-driving car "sees" an obstacle(障碍物), it sends this information to data center and receives instructions. However, it takes time to do that. That's the time lag. With this kind of lag, the car might have an accident because it doesn't receive instructions in time. But with 5G, the self-driving car can receive instructions more quickly.
5G can also be used to power the Internet of Things (IoT). This refers to a large online network that connects all things and people. Fast Internet speeds will be the key to developing this technology. For example, with IoT, your smart fridge could order eggs online when it notices that there are no eggs left inside.
