Go to Linyi Municipal Administration for Market Regulation for review. According to the official website of Linyi Municipal Market Supervision and Administration Bureau, masters holding forklift certificates should apply to Linyi Municipal Market Supervision and Administration Bureau for review three months before the expiration date. The validity period of special equipment operation projects is 4 years. When forklift operators undergo annual review, they need to do so three months in advance and submit the original cross-car license, ID card, review application form and work certificate, etc.