Chalk, suitable for basic white, content structure chapter focus first, super-class notes, very complete and detailed, huge knowledge system.

Xueba, in network language, refers to a person who is good at learning, has a higher ability to accept knowledge than ordinary people, and can play a great advantage over ordinary people in learning. Most schoolmasters have the mentality and ability to get high marks easily, and they can also get high marks easily when others fail in the exam.