CTI provides chemical analysis services for the active ingredients of drugs/health products related to quality control samples, which are mainly used for method verification and confirmation, quality assurance of the testing process, etc., which can be used for blind inspections of regulatory agencies, supervisory reviews, re-assessments, and unannounced inspections. Samples can also be used for accusation samples or blind samples such as laboratory internal audit, daily quality supervision, quality assessment, personnel assessment, method comparison, personnel comparison, and equipment comparison.