Four years. Official website, Education Bureau of Rizhao City, shows that the term of office of teaching experts in Rizhao City is four years, and they need to be re-elected after the expiration. The selection of teaching experts in Rizhao city adopts the combination of material review, on-site teaching and expert review. The selected teaching experts were awarded the title of "Rizhao Teaching Expert" by Rizhao Education Bureau for a term of four years. It is necessary to adhere to standards, strict procedures, strict work discipline, strict checks, value quality over quantity, and earnestly safeguard the seriousness of the selection work. Teaching experts refer to outstanding teachers with high teaching level and teaching ability who have won the honorary title through selection.