1, Liu Dan, a first-class constructor, is a well-known domestic engineer, teacher, associate professor, supervisor and examination tutor of Chongqing University with rich teaching experience.

2. Teaching is systematic and logical, and it is good at summarizing the difficulties and key points in laws and regulations, which can help students master the key and difficult contents of the examination syllabus in a short time. The test center is accurate and the lecture is vivid, which is very popular among students.