What do you mean by four tricks?

A recruitment method. Four-party recruitment is a recruitment method, also known as four-party recruitment or four-party joint recruitment, which refers to an open recruitment activity jointly organized by multiple enterprises. Four strokes are usually organized by some enterprises that cooperate with each other or in the same industry, aiming at providing more job opportunities for more job seekers and reducing the recruitment cost and work pressure of enterprises. In the quadruple recruitment, a number of enterprises * * * jointly organize recruitment activities, * * * enjoy recruitment resources and information, * * * participate in the recruitment process, be responsible for the screening and interview of recruitment positions, and in the final recruitment process, job seekers choose their favorite enterprises by themselves.