In the field of welding, there are generally two more common international certification, the International Welding Engineer, that is, IWE, in Harbin, Harbin Welding Institute for training, the requirements of the welding professional bachelor's degree work for four years, the difficulty is not particularly large. Training totaled about 3 weeks, the cost of 6500 seems to be; the other is the American Welding Society's Certified Welding Inspector, and CWI, in the Shanghai Welding Association or Modi (Shanghai) Consulting Co., Ltd. can apply to participate in the training and examination, the cost of 12,345, 5 days of training, one day of the examination;