Very good. Live teaching is very good, with the advantages of fast learning speed and detailed knowledge points. Webcasts can be roughly divided into two categories. One is to provide TV signals to watch on the Internet, such as live broadcasts of various sports competitions and cultural activities. The principle of this live broadcast is to convert TV (analog) signals into digital signals through collection, input them into computers, and upload them to websites for people to watch in real time, which is equivalent to "Internet TV"; The other is what people know as "webcasting".