333 people. There are 333 senior teachers with professional titles in Danzhou Education Bureau. Teachers with senior titles in primary and secondary schools are deputy senior teachers, equivalent to associate professors and deputy division heads. There are five levels of professional titles, from senior professional titles to ranks, which are senior teachers, senior teachers, first-class teachers, second-class teachers and third-class teachers in turn, corresponding to senior, deputy senior, intermediate, assistant and rank titles respectively.