Summarize the nature of "Xing" in Tang and Song Dynasties and its later evolution.

Guilds have become more popular, and all industries have their own organizations. The function and function of traditional guilds are not completely independent, and guilds have been widely developed in China. With the further development of folk handicraft industry, many "guilds" will inevitably lead to more organizations in the same industry. "Guild" or "Guild" began in the Tang Dynasty and stipulated the specifications of handicraft products, which were mainly reflected in limiting the number of hired and used helpers, commercial monopoly and technical conservatism. Because the guild participates in production and business activities, a unified wage level is stipulated. However, as a form of economic organization, the private handicraft industry has not developed rapidly because of its closed organization, which limits the location and number of workshops. In the Song Dynasty, the government often intervened in the economic field in order to share the risks of production and management. From Ming Dynasty to Qing Dynasty