By the end of this period, the boundaries established by the Qin dynasty and maintained by the Han more or less define the present-day nation of China. Other enduring aspects of Chinese culture introduced at this time include Confucianism; an administrative system that serves as a model for government until the early twentieth century; and the construction of the Great Wall of China. The Qin dynasty, pronounced chin, will become the source of the Western name China. The arts introduced in the previous period—bronze casting, lacquerwork, and jade carving—flourish. Technical innovations such as the casting of copper, silver, or gold into the decoration of bronze vessels herald the beginning of a new style of metalworking often thought to have been introduced into China from the West.