Imagine the situation. You are driving alone in a desert or on a mountain. You have no idea where you are. You passed the last house two hours ago. Then your car breaks down. It is night and it is cold. You forget to take a mobile phone with you. What do you do? Well, next time take a GPS with you. This invention may be able to help you. It is a device which uses satellites (卫星) to find the user’s position (位置). A GPS cannot start your car, but at least you will know where you are.

GPS, which means Global Positioning System, is a small radio receiver. It looks like a mobile phone. You can hold it in your hand, or put in your pocket. It is sometimes put into a watch or a telephone. We also find GPS devices in cars, planes, or boats. Some of these devices have electronic maps, so you know where you are. For example, in a city they can tell you the name of the street.

There are three parts to the Global Positioning System. The first part is the receiver. You can hold it in your hand, or have it fixed into your car, plane, etc. The second part is a group of satellites orbiting the earth. The receiver connects at least four of the satellites and calculates (计算) its position. The third part of the system is a network of ground stations. They are all over the world. They control the satellites and make sure they are working well.

Some people think that in the future the GPS will be as common as the mobile. They are becoming cheaper and more and more accurate (精确的). There are also new uses for the GPS. Perhaps they will become like watches. Everyone will have one and you will never be lost again.

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With the development of China, it’s believed that China will achieve modernization of science and technology.

First of all, it is possible for our Chinese to get a new way of resisting(抵抗) virus. As far as we know, COVID-19 attacked（攻击） us. It’s difficult to make it disappear completely. According to it, human beings have a better understanding of virus and kinds of researches are born. With plenty of scientists’ hard work, creating a new way of resisting(抵抗) virus can be achieved. The new way is called nano-antibody(纳米抗体） which was found firstly in the serum（血清） of alpacas（羊驼）. Because of its high cost, it isn’t popularized. However, cheap production mode was created after ten years’ research. It will be popularized in the future.

Second, China creates a quanturm computer（量子计算机） which was put forward in the 1980s. It can win any other computer in the world because of its super computing power and splitting computation speed. A great number of funds(资金) are put in by tens of large-size computer companies such as Google and Microsoft. Last December, University of Science and Technology of China announced that the quanturm computer named Nine Chapters was created. Maybe it will enter ordinary people’s home in the future.