Entry samples can be added in the directory of research and development enterprises and institutions and supervised conveniently if they are needed by research and development enterprises and institutions. Except it is necessary to implement risk pre-assessment for pilot enterprises and relevant samples according to relevant regulations, pre-assessment is generally not required. If pre-assessment is really necessary, the procedure shall be further simplified. Low-risk entry samples are allowed to be approved once and verified several times. Further optimize the inspection formalities and procedure of entry samples, and implement a risk grading supervision mode. The qualified products and enterprises can be inspected at the place of arrival according to their will. The low-risk entry samples of credit enterprises above level B, can be monitored by remote video, and inspected by the enterprises themselves according to the inspection and quarantine requirements.