24 hours. Safety B certificate is one of the certificates that personnel engaged in safety production management need to possess. According to Article 85 of the Law on Work Safety, the holder of the certificate needs to receive continuing education regularly to maintain the validity of his certificate. Compared with other certificates, the requirements for continuing education of Safety B Certificate are lower, which requires 24 hours of training every year, so the continuing education time of Guangxi Safety B Certificate is 24 hours.