it is to replace the previous PC with a cloud terminal. Compared with thousands of PCs, the cost of cloud terminals is much cheaper. It only needs about 1/11 of it, which makes the overall purchase cost drop sharply. A server can easily bring up a classroom cloud terminal, which is not only more economical, but also makes operation and maintenance more convenient. Zhongnan cloud terminal only needs 5W energy consumption, which is the cloud terminal itself, and the stability is greatly improved because of its unique design. Even if there is a defect in one machine occasionally, it is only required to replace one, so that the previous teaching can be continued without any influence.