Nankou Town, Changping District, Beijing. According to Baidu map query, Dongxiaokou Vehicle Management Office in Changping District is located in Nankou Town, Changping District, Beijing, and it is relatively easy to find in the yard of Beijing Hongyuan Inspection Field. DMV refers to dmv. Vehicle management office, full name of vehicle management office, is mainly responsible for undertaking motor vehicle registration, change, transfer, mortgage and cancellation of registration.