You can apply for the secondary school diploma, and you can apply for the secondary construction engineer two years after graduating from secondary school. It's not difficult. I've passed and I'm preparing for the Level 1 exam. My technical secondary school diploma is engineering design. At that time, I asked Tonghui Education in Changsha, Hunan Province to help me sign up for training. The effect is very good. If you want to save trouble and worry, please ask them to help you with the registration procedures and prepare for the review exam with peace of mind. It's good. Tonghui Education has a teacher named Ming. Yes, I just found her at that time.