According to the inquiry of Chengdu local treasure, the limit range of Chengdu tail number is: all roads within Chengdu Ring Expressway (G4202) (excluding), and there is no limit to the number around Chengdu. Vehicles with restricted tail numbers: all "Chuan A", "Chuan G" and small and micro passenger cars from other places. According to the last Arabic numeral of motor vehicle number plate (including temporary number plate), it is divided into five groups, and one group is forbidden to pass in the above-mentioned restricted time and restricted area every working day. The suffix combination and corresponding rules are: "1" and "6" on Monday; Tuesday is the 2 nd and 7 th; Wednesday is "3" and "8" Thursday is "4" and "9"; Friday is "5" and "0".