Sorry I cannot reply in Chinese, but hopefully the English will translate well enough for you.
Speaking for myself and my personal experience, I find the study of electronics and the application of electronic devices and engineering to solving problems to be very satisfying.
I think my progression in my career is very common, not extraordinary. So I will give a brief overview.
I graduated with an electrical engineering degree with an electronics add on notation. What this meant was that the major part of my study was related to power engineering (AC-DC, power distribution, etc.), but I also had classes in electronic devices and computers. This was in the early days of transistors.
After University graduation, I worked in the aerospace industry as a failure analysis engineer for the electronics in satellites. I also was fortunate to be able to help provide data on the location and extent, and intensity of the Van Allen Radiation Belt which was a major concern for the health of astronauts. I also helped maps the Earth's Magnetosphere, the electrically charged layer that surrounds the Earth and helps protect it from ionizing particles from space.
Later I worked as a design engineer for electronic systems for a company primarily serving military needs. I can't really talk about that.
After that I worked in a more commercial company designing specialized products for the building industry.
Still later, I worked as a customer engineer for Intel Corporation with the primary responsibility of helping customers design in the company microcomputer and memory chips. That let to a regional marketing position covering the Far East with the responsibility of assisting customers to design in microcomputers for their product applications. That position also include responsibility for new business development and finding new ways to use microcomputers and software. This was the transition to marketing which is referred to by one person who answered the original question on this post.
Later I worked for a networked computer company, then another semiconductor company specializing in audio products and lastly with National Semiconductor as marketing director, and later technology director for their audio group.
Along the way I had the opportunity to work with many leading edge products, and was also fortunate in being able to define some of them and bring the successfully to market.
And, during all this, I was able to travel the world, meet many wonderful people from different countries and cultures, and broaden my education in so many ways. I still have friends in many of these places around the world.
The most gratifying aspect of the work was working with people who had great intelligence and foresight, strong work ethic, a strong passion for what they were doing, and who really really enjoying what they were doing. And they knew they were making a measurable difference in the technological life of people.
The lesson here is that as you are in university, you can never know the actual path you will follow. Some paths will be directed, that is you are interested in that path. Other paths will be accidental, something you fell into. The key to all of this is to realize that it is your intelligence and interest and skills which will do more to guide you than some kind of "preset" idea about the work.
The other thing to realize is that technology moves very fast, and what you study in the university may not be what you really need to know to survive in industry or your chosen professional field. As one responder to the original post said, you need to keep options open. You also need to keep an open mind. And, you must always be willing to continue to learn both on the job and off the job.
There was no such thing as a microcomputer when I went to school, yet I was fortunate enough to keep learning and finally work for the major company in that field.
Also, I have always had an interest in music and audio. It was really great to be able to work in that field for many years as well.
Lastly, the shift from engineering to marketing is not a black and white choice. Many people have the wrong idea about what marketing is. The successful technology marketer will always be an engineer first, and marketer second. Why? Because the successful marketer (engineer) will be the one that solves his customer's problems using the best technology and most cost effective solution. To do both engineering and technology marketing requires that you constantly stay up-to-date with the latest technology, trends, and market situations. You do NOT want to be known as a marketing person that really knows nothing!
If you are really fortunate, you will be able to work for great companies that share the same passions as you do. That is the best !
If engineering is your passion, you will arrive at the end of your career much as I have (as well as many others along with me). If engineering is not your passion, you will tire of it very quickly and seek something else. If at all possible, follow your passion. Most of the time, economic success will follow as well.
Good luck in your studies and career choices. I, for one, still view the electronic field as ripe for many more innovations and inventions and even further importance in your life.
