If you are introverted and good at tackling key scientific problems, please refer to scientific research institutes or universities for employment or doctoral studies, such as Shanghai Institute of Optics and Mechanics, Chinese Academy of Sciences, Research Center of Optics and Electromagnetic Waves of Zhejiang University, Yuquan Campus-Institute of Microelectronics and Optoelectronics of Zhejiang University, Institute of Engineering Thermophysics of Chinese Academy of Sciences, and Institute of Aerospace Heavy Industry.
If you are cheerful and like challenges, you can choose enterprise development. This enterprise can include optical simulation, institute of optics and mechanics, institute of solar energy, aerospace, some cooperative enterprises under CSIC, and some local small and medium-sized photoelectric companies, such as Wanbo Optoelectronics, Haoke Optoelectronics Instrument Company, Hangzhou Xinxing Optoelectronics and Hangzhou Zhida Optoelectronics! After entering the enterprise, you will be exposed to more things and things will be more complicated, so you will distract your research energy.
Finally, I wish you a good grasp of the future and find a job that suits you!