Beijing Continental Hengtong Certification Co.,ltd (hereinafter referred to as CHTC) is an authoritative certification body ,which is established under the approval of the Certification and Accreditation Administration of the People’s Republic of China (CNCA) (Confirmation Number:CNCA-R-2003-115).CHTC successfully got the approval of China National Accreditation Service for Conformity Assessment (CNAS) (Confirmation Number:CNAS C106-M, CNAS C106-P).