As to the composing of the law,the commercial law in the Qin and Han Dynasties mainly consisted of rule and order and auxiliary consisted of pattern,sentense and Comparison.The structure of the feudat commercial law was formed in the period from the warring states to Qin Dynasty.The commercial law was enriched in the prophase of the Western Han Dynasty.The commercial law was strengthened in the metaphase and anaphase of the Western Han Dynas...