High speed train from Chong qing station to ZhangJiaJie

hello,

I have been looking for high speed train (class D) from Chong Qing to Zhang Jia Jie, which is supposedly to take 4 hours, but so far the tickets I see are all class K (6 hours plus). Is there still Class D high speed train from Chong Qing to Zhang Jia Jie Station?