Every night at 23 o'clock. According to the official website, Cangzhou People's Government, Cangzhou Nanchuan Loudong Street Night Market is open from 20: 00 to 23: 00 every night. It opens and closes on time, and the night scene closes with the end of the night market. Nanchuan Building, located in the south of jiefang bridge, Canal District, Cangzhou City, east of Nanhu Park, is a landmark building beside the Grand Canal.