Change major
See what junior college classes are available in your secondary school. If you are interested in that major, you can communicate with the class teacher. You can change your major at ordinary times and have a teacher to help you take the exam.
Adult college entrance examination
There are more choices to take the adult college entrance examination than your school's college major. You can apply for some training courses or something.
self-taught examination
Take the self-study exam. The specific time and major should be consulted by the self-study center or the Education Bureau in your city. You can check it online.