It depends on personal needs. The examination of the second construction project is not very difficult. If the self-study ability is poor and the economic conditions permit, it is recommended to study with the class. After all, there is a difference in learning efficiency between having a teacher explain and not having a teacher explain. If you have a strong ability to teach yourself, you can also teach yourself. Whether to apply for the second construction project depends on your own needs. Listen to your inner thoughts.