In mid-September 2015, in the early autumn season, with high skies and fragrant laurel, another group learning event was held.

Quality control method is a quality management method to ensure product quality and make it continuously improve. It is through the study and analysis of the distribution of product quality data, reveal the law of quality differences, find out the causes of quality differences, take technical and organisational measures to eliminate or control the factors that produce inferior or substandard products, so that each link in the whole process of production can be normal and ideal, and finally make the product can achieve the natural properties and characteristics that people need, namely the suitability, reliability and economy of the product. reliability and economy.