Jade articles in Song Dynasty have the value of oil extraction. According to the relevant public information inquired, the market price of the real old oil-pressed ancient jade is around 5,000 yuan. Lezi, pronounced lüizi in ancient times, originated from the application accessories of knots, and was not jade agate at first. The rope wrapped in animal skins, tied tightly at the upper and lower ends with thin ropes, became a grasping function, and then developed into a more durable stone jade material until it became an ornament and so on.