What is the biggest difference between Liu Ti and Yan Ti in brush calligraphy?

Liu Ti's paintings are even and thin. Fang Bi's words are straightforward and clear-cut, and his stippling is sharp and firm. The law is strict and heavy. This method is quite different from Yan Ti, which is vigorous and vigorous. Yan Zhenqing and Liu Gongquan belong to the Tang Dynasty, and they are one of the representatives of calligraphers in the Tang Dynasty. They pursue Wei and Jin demeanor in brushwork, are graceful and generous, and their fame is above that of Liu.