Today, 27 years ago, on December 23, 1998 (Lunar Calendar, November 5, 1998), Beijing for the control of pollution discharged thousands of cars "face" in the first steel was returned to the fireplace. Long Door Hanging Heavy Hammer will repay the "face" to "tinnitus" and cut back to the oven. On December 23, 1998, Beijing thousands of cars "face" in the first steel were asked to iron fireplace. As one of the Beijing city's emergency measures to control air pollution, 80,000 "face" still in operation before the end of 1993 will be repayed to the whole car. According to the report, a new "face" at a speed of 40 km / h exhaust gas emissions were 1.46 times that of ordinary buses, while 1 used a five-year "face", its exhaust gas emissions