一名机动车登记服务站的工作人员在展示蓝标（3月1日摄）。今年3月1日起，北京市开始停止销售、注册不符合“京Ｖ”排放标准的轻型汽油车。为便于识别与区分、突显较好排放标准的车辆，北京市环保局对符合第五阶段及以上排放标准和纯电动车辆发放蓝色环保标志。第五阶段及以上排放标准的车辆环保检测周期为登记注册六年内每两年检测一次，六年后每年检测一次。纯电动车辆无需环保检测，每六年到检测场更换一次环保标志。蓝色环保标志，内嵌电子芯片，使用六年更换一次，不用每次检测后更换。新华社记者 倪元锦 摄 A motor vehicle registration service station staff is displaying blue label(Taken on March 1,).On 1 March this year,Beijing began to stop selling/Registration does not conform to the"Beijing V"Emission standards for light-duty gasoline vehicles.For ease of recognition and distinction/Underline the good vehicle emissions standards,Beijing municipal environmental protection bureau for stage 5 and over discharge standard issue blue environmental protection logo and pure electric vehicles.Stage 5 vehicles and over discharge standard environmental test cycle for registration within six years inspection once every two years,Six years later testing once a year.Pure electric vehicles without environmental detection,Every six years to the testing field replacement environmental labels at a time.Blue environmental protection logo,Embedded electronic chips,Use replaced every six years,Don't change after each test.The xinhua news agency reporters NiYuanJin perturbation