1. According to JD.COM APP, Cai Sheng Education is a high-tech software enterprise whose main business is research and development and sales of educational software, and is committed to providing comprehensive and high-quality educational resources and services for teachers and students.

2. The author of Cai Sheng's sprint paper before the exam is an expert from Cai Sheng Education Research Institute. He has rich teaching experience and proposition experience, can accurately grasp the direction of examination proposition, and provide effective help to candidates with high accuracy.