Regular script is a neat,regular,standard form of calligraphy,which prevailed after official script,originated in Xihan dynasty,matured and blossomed in Wei and Jin dynasties,reached its peak in Tang dynasty.After Wu Dai dynasties,in Song,Yuan,Ming and Qing dynasties,regular script was a mere imitation of Wei,Jin,Bei Chao and Tang dynasties.Though with minor innovations and different styles,the declining trend was obvious.The fudamental reason was a lack of coeation.On the whole,during this stage,little artistic achievements were made,no great calligraphers like Zhong Yao,Two Wangs and Yan Zhen-qing ever emerged.