It is not allowed under normal circumstances. But you can find a formal training institution to help you privately. (Note that it is a formal institution) You can also find a psychological counselor, consult a teacher, or a senior who has already passed the second-level construction engineer. Some training institutions will help students take an adult secondary school degree first and register with an adult degree. Anyone over the age of 20 can apply for the exam, and you can find a unit to stamp it, that is, register on your behalf. It is necessary to know in advance whether the organization is formal, and don't lose your wife and soldiers, leaving both people and money empty. If you want to take this certificate, you have to break through and give it a try. You are young and smart. Come on!