On December 21, the reporter learned from Tianfutong Company that Chengdu and Chongqing have officially realized the "one QR code" bus and rail transit. From now on, Chengdu citizens can use the Tianfutong App to scan the code for Chongqiies; Chongqing citizens can use the Chongqing Civictong App to scan for Chengdu’s bus, subway, tram and BRT