To be associated with the sustainable development process, Sigma always applies the principle of "people-centered". In other words, the human factor is always associated with the success of Sigma. In fact, there have been many successful businesses when promoting the role of people, especially in the most developed economies in the world such as Japan, the United States, China, etc. As a matter of fact, many countries attach great importance to investing in human development through activities such as safety training, skill training as well as internal personnel training. Understanding this, the Company's management decided to improve the quality of internal human resources, including the policy of distributing personal protective equipment (PPE).