2. You can study TV University locally, and then take the college entrance examination in CUHK. No problem. Don't worry, just study hard. You can study other forms of undergraduate courses, such as TV University and online education. Even if you don't go to college. All are nationally recognized academic education.
3. The difficulty of upgrading from college to undergraduate depends on everyone's foundation and preparation. In addition, work depends on opportunities and abilities. After all, education is only the threshold for entry. I believe where there is a will, there is a way. As long as you have a goal and keep working hard, you will get something. Come on!