Test analysis: This question mainly examines the students' ability to accurately interpret the information in the material. The "China Lanting Calligraphy Festival" in the materials is obviously to commemorate Wang Xizhi, the author of Preface to Lanting, who is the most famous running script master in the Eastern Jin Dynasty in ancient China, so the answers are A, B, C and D, three famous regular script masters in the Tang Dynasty. Of course, Yan Zhenqing is also good at running script creation.