四工致性美刘熙载曾言“学书者始由不工求,继由工求不”①。而追求工巧和精密,一也是古人美学思想的最重要组成部分之,这里也存在一种人的个体发展和社会发展的同构现象。早在旧石器期,就有“北京人制作的‘尖状器’,由于曾对器物两侧进行过细致的修理,使得它的整体的外轮廓呈现出颇为悦目近于对称三 Four workers due to the United States Liu Xizai had said ”scholar of the book did not work from the beginning, following the work seeking “ ①. The pursuit of craftsmanship and precision, one is also the most important part of the ancient aesthetic thought, there is also a kind of human’s individual development and social development of the same phenomenon. As early as the Paleolithic period, there were ”sharp-pointed" beacons made by Beijingers. As a result of careful repairs on both sides of the objects, the overall outline of the objects appeared quite pleasing to the eye as far as symmetrical three