Clinical monitoring refers to site monitoring, CRA conducts the site monitoring of the assigned projects, who holds GCP certificate, relevant work experience, strong communication, coordination and problem-solving ability. The Site monitoring composes site selection, site startup, site initiation, patient enrollment management, routine monitoring, source data verification, site closure etc. CRA actively cooperates with investigators, sponsors, and project teams to ensure the delivery of the study site meets the overall needs of the sponsor’s study.