According to the archaeological discoveries, about 4,700 years ago, the people in China began to use the silk to make into silk yarn, to knit silk strip and simple silk objects. During the Shang and Zhou dynasties, the silk was already woven into the silk products such as gauze, damask silk, pure white and fine silk, voile, crape, plain silk cloth with twill patterns, brocade and embroidery. According to the feeding habits, the silkworm, oak silkworm, cassava silkworm, camphor silkworm, willow silkworm and antheraea yamamai. The strand silk taking out from a single cocoon is called the cocoon silk formed by two threads of single bound and coated by sericin. When reeling silk, the cocoon silk from several silk cocoons is taken out to bind into strand silk by sericon, which is collectively called the cocoon fiber silk. The cocoon fiber whose sericin is removed is called the degummed silk. Amongst the most usage amount of the cocoon fiber silk is the mulberry silk and then comes the tussah silk while other kinds of silk have not formed the resource due to limited amount.