Poor grades in the senior high school entrance examination don't mean you can't have good development and career prospects. Science and technology industry is an area with huge market demand at present. Here are some technical directions to consider learning:

1. programming language: mastering programming language can make you an excellent programmer and improve your practical ability of computer technology. Common programming languages are Java, C++, Python and so on. You can master relevant knowledge through self-study, participation in activities or training.

2. Big data analysis: With the development of Internet technology, the demand for big data analysis talents is growing. Learning big data analysis can make you become an expert in related fields, master various analysis tools and technologies, quickly process massive data, and help companies improve efficiency and competitiveness.

3. Artificial intelligence: Artificial intelligence is a hot topic in the current technical field. If you are interested in mathematics, theoretical reasoning, algorithms and programming techniques, you can try to learn artificial intelligence and become an artificial intelligence engineer or data scientist.

4.3D modeling and design: 3D modeling and design is an important technology in the fields of architecture, industry and manufacturing. Learning these knowledge and skills can make you an architect or a product designer.

5.UI/UX Design: UI (User Interface Design) and UX (User Experience Design) are important design directions, which can make you a graphic designer or a web designer. Learning these knowledge and skills can help enterprises improve their user experience and brand strength.

In a word, all disciplines and fields need hard work and study. According to your interests and talents, you need to deepen your professional knowledge in this field as soon as possible, master relevant technologies and knowledge, and be prepared for the upcoming new occupations and challenges.