(The Internet has changed everyone's life. The earth has become a global village, and people all over the world can exchange at any time. The world's resources are fully shared, and everyone's productivity is unprecedentedly advanced. With the advent of the Internet age, the Internet is getting closer and closer to everyone's life. Some people's life is now inseparable from the Internet. Online securities and futures trading, remote electronic video conferences, online shopping etc., the construction of information superhighway has become very important.)