White-collar workers: people with high academic qualifications and work experience. It is a general term for workers who do not need to do a lot of physical labor in enterprises in western society, also known as white-collar workers. Corresponding to blue-collar workers, white-collar workers generally have a stable income.

Blue collar: "﹙Blue-collar worker﹚" is the western definition of lifestyle. This concept was put forward by the United States in the 1950s, when the United States entered the information age. The term "blue-collar workers" appeared relatively late and only began to appear in the 1940s. Known as white-collar relatives, it refers to all working-class people who mainly do manual labor, such as ordinary industrial and mining workers, agricultural workers, construction workers, dock workers, warehouse managers and so on. Blue-collar workers belong to middle-income groups.

Gold collar workers: Gold collar workers are recognized by society for their comprehensive qualities such as knowledge structure, public relations ability, team coordination ability, management and operation ability and social relations resources. It is generally believed that Jin Ling is not only a top management expert, but also has the right to manage the fate of white-collar workers. They are generally over 40 years old, and many of them got their degrees from abroad. With their profound professional knowledge, excellent quality and understanding of life, they won the respect and recognition of others. The "golden collar" class are generally veterans with good educational background and achievements in a certain industry, and their income is generally considerable.

Generally, the golden collar class is the senior managers of foreign-funded enterprises, the Chinese representatives of foreign-funded institutions in China, the managers of large private companies and the senior leaders of state-owned enterprises. The status of the gold collar class depends not only on solid professional knowledge, but also on rich professional experience, which is one of the main factors that make them have such a status today. Just graduated college students, even MBA graduates, generally can only be white-collar workers, not gold collars.

Yinling is a senior technical talent with high level of knowledge, strong innovation ability and high skills, and a compound practical talent with both knowledge and skills.