[China Xuyang Group: continuous performance in 2021 is expected to continue] on March 25, China Xuyang Group released its annual results for 2021. According to the data, the performance of Xuyang Group continued to improve in 2021, with operating income of 38.43 billion yuan, an increase of about 94.2% over the same period last year, a net profit of 2.613 billion yuan, an increase of 58.1% over the same period last year, and the coke business was the largest source of income, accounting for 41.4% of the total income.
Steel is a fundamental raw material for all industries. It can be widely used in vari-ous fields, including construction, bridges, ships, containers, medical devices and cars. However, the production process of iron and steel is very perplexing, which consists of four processes: ironmaking, steelmaking, continuous casting and rolling. It is also extremely complicated to control the quality of steel during the full manufacturing pro-cess. Therefore, the quality control of steel is considered as a huge challenge for the whole steel industry. This thesis studies the quality control, taking the case of Nanjing Iron and Steel Group, and then provides new approaches for quality analysis, manage-ment and control of the industry. At present, Nanjing Iron and Steel Group has established a quality management and control system, which oversees many systems involved in the steel manufacturing. It poses a high statistical requirement for business professionals, resulting in a limited use of the sys