The experimental class of technical science in Nanjing University is a class with great advantages in science, which is divided into two directions: humanities, social sciences and natural sciences. In choosing a major, you can choose according to your personal interests and career planning. Choosing the best major depends on personal interests and development direction. The following is a brief introduction to some professional directions of the technical science experimental class of Nanjing University for your reference:

1. Electronic information majors: such as electronic science and technology, communication engineering, microelectronics science and engineering, etc. These majors train professionals in the field of electronic information, and have higher requirements for computer, communication and other fields.

2. Major in materials science and engineering: such as materials science and engineering, new energy materials and equipment, etc. These majors train professionals in materials science and engineering, and have higher requirements for materials research and preparation.

3. Major in architectural and civil engineering: such as civil engineering, architecture, urban and rural planning, etc. These majors train professionals in the direction of engineering and architectural design, and have higher requirements for engineering practice and design.

4. Biomedical major: such as biomedical engineering and bioinformatics. These majors train professionals in biomedicine and health, and have higher requirements for biomedical research and medical device research and development.

Please note that the above is only a brief introduction to some general directions, and the specific choice of major needs to be judged by combining personal interests and career planning. I suggest you refer to the enrollment materials of the engineering experimental class of Nanjing University and the curriculum of related majors, compare your interests and abilities, and finally make a choice.