The training was hosted by Manager Wang Yan, general agent of Shikotsu Tianjin Region, and explained by engineer Li Hairui of its analysis center. Mr. Li gave a detailed explanation of the principle of emission spectrum and analyzed the cases in the actual use of the instrument. In terms of practical operation, Mr. Li explained the problems encountered by students one to one; At the end of the training, Ms. Li emphasized the maintenance of instruments and equipment and matters needing attention. Through this training, the students deepened the understanding of the principle of the instrument and equipment, and mastered the relevant operation of the instrument and equipment.