Silk was greatly valued and often used as currency or money. A man’s salary would be a certain length of silk per year. Silk garments were worn by Roman emperors, who called the Chinese Seres (Silk people). The clothes are beautiful, light and comfortable, being cool in summer and warm in winter.
Over the years, the Chinese were able to breed a species of silk moth that is blind and unable to fly. Each lays 500 or more eggs in a few days and then dies. After hatching, the baby worms are fed on freshly chopped mulberry leaves day and night for about a month until they become fat. Each then spins a cocoon around itself, and this is where the silk comes from. Every cocoon is made of a filament about 800 meters (875 yards) long.
The five primary colors in China are:
Red Black Yellow White Green
Blue is not one of the five primary colors in China. It is the color of the ocean, the sky and immortality. According to legend，the universe began as an egg. Out of the egg hatched a man named Pan Gu. Half of Pan Gu’s shell became the sky above, and the other half formed the ocean below. Pan Gu grew for 18000 years，separating the sky from the ocean further and further. Finally he collapsed and became immortal.