The advantages of saliva drug test:
(1) The sample is clean
(2) Sampling is convenient, decent, and privacy is not violated
(3) Can be sampled face to face at any time, regardless of site restrictions
(4) It can avoid adulteration and bag drop, and can be sampled and tested one-to-many.
(5) Saving manpower and material resources, can greatly improve work efficiency, and is not subject to gender restrictions