You can retake the exam. Applicants need to log in to the special software issued by the local construction administrative department, apply for cancellation of registration, then print the relevant materials, affix the official seal of the registered enterprise of the second-level construction engineer, and send it to the construction administrative department for review, so as to clarify the reasons for cancellation. After the approval of the Provincial Construction Department, you can re-register for the second construction engineer safety B certificate examination.