According to the relevant regulations, the validity period of the builder's certificate is 3 years. Before the expiration of 3 years, you can continue to use the builder's certificate after attending the required hours of continuing education and passing the examination (assessment). Generally, the unit organizes continuing education and takes exams in local schools. However, if the relevant departments do not organize the construction engineer to continue education, they will go to the local training center to participate in the training re-examination.