Quasi. Through the evaluation of the present situation in five aspects: word ability, listening ability, reading ability, writing ability and translation ability, the predicted score of Band 4 and Band 6 is obtained. Chalk Band 4 and Band 6 is an APP that focuses on preparing for Band 4 and Band 6 exams. It recites words+carefully compiles real questions+daily live broadcast+writing and translation correction+model test contest+intensive listening training.