How many groups are there in Xinyang Changtai Guanchu bamboo slips? What are their characteristics?

1957 unearthed Xinyang Changtai Guan Chu bamboo slips, which are a single-line ink book made of bamboo, are divided into two categories according to their contents. One is a bamboo book 1 19, and the other is a dispatch book with 29 pieces. The structure of bamboo slips is upright, and the horizontal trend becomes more prominent. The lines are round and vigorous, and the horizontal painting runs through the left and right sides of the bamboo slips, and the pen bends slightly. Compared with bamboo calligraphy, oblique calligraphy is more agile, heavy and light, and sometimes the pen is bent and oblique. The structure is Fiona Fang, and the body posture is mainly vertical.