4 K8s began service in Xi'an in August 2012 with another 46 units expected to join them around the end of 2012.[6][8]【参考译文】2012年8月,4辆K8巴士在西安市投入运营,预计2012年底前将有另外46辆巴士加入。[6][8] Haikou City began testing K9s in August 2011.[65]【参考译文】2011年8月...