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" of your mobile network. But they will become history after the 5G network fully arrives.
In recent years, China makes great achievements in 5G. Now it's making efforts to popularize the business use of 5G. Shanghai is the first city in China to start testing the 5G network. On March 30,2019,Wu Qing, one of the leaders of Shanghai, made the first 5G video call with a Huawei Mate smartphone.
5G allows people to download and upload data faster than ever before. It is at least 10 times faster than the 4G 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. When a self-driving car"sees" an obstacle(障碍物),it sends the 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 in a shorter time.
5G can also be used to power the Internet of Things(物联网). 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 the Internet of Things, your smart fridge could order eggs online when it notices that there are no eggs left inside.
The facts listed above are only part of what 5G can do. Just as in the early days of the Internet in the 1990s, few could see how it could change the world. The same will surely happen to 5G. With 5G,many things do not seem like dreams to anyone. Now let's get ready to say goodbye to 4G and welcome the coming of 5G.