1. A secondary professional degree generally refers to a postgraduate education degree with special professional requirements, which is different from academic degrees focusing on theory and research, and mainly cultivates senior professionals with specific professional backgrounds.

2. At present, China's professional degrees are mainly set at the master's level. With approval, professional master's degree education has been held in 39 disciplines including business administration, public administration, education and law. In 2009, the enrollment scope was expanded to new graduates.

3. Traditionally, electrical engineering is defined as the sum of related disciplines used to create and produce electrical and electronic systems. This definition is very broad, but with the rapid development of science and technology, the concept of electrical engineering in 2 1 century has gone far beyond the above definition. Professor Stanford University pointed out that today's electrical engineering covers almost all engineering behaviors related to electrons and photons.