In the middle 19th century, Chinese craftsmen were still using traditional method of filing by hand to make needles, while the British needle-making industry’s procedures of manufacturing needles had most achieved mechanization.
Qingdao, a beautiful coastal city, is one of the cradles for national industry in the contemporary era. In the 1920s, Yin Zhizhong, a person from Shangdong’s Ye County, went to Japan to learn the technique of making needles.
(1) Needles used by enterprises: 1.Storage: The product should be stored in a warehouse. It is prohibited from being stored outdoors. The warehouse should be dry and vented, with a relative humidity of no larger than 85% and a temperature of no higher than 45°C.