The UN38.3 test is a mandatory test to ensure that lithium batteries can be safely transported by air or sea. The Civil Aviation Administration of China issued the "Lithium Battery Air Transport Code" to all air transport companies, which clearly requires that lithium batteries must pass the CNAS-approved laboratory for UN38.3 testing before air and sea transportation. All airlines must receive lithium batteries. The lithium battery can only be accepted for transport under the premise of UN38.3 conformity report and transportation appraisal.