The holotype specimen (CCG V 20401) consisted of an almost complete and articulated vertebral column; including 19 elongated cervical vertebrae which were almost entirely preserved, 12 dorsal vertebrae, four sacral vertebrae, and 35 caudal vertebrae with only the last several missing. Also missing from the skeleton was the majority of the forelimbs and skull. The total length of "M. hochuanensis" is about with a long neck. When "M. hochuanensis" was first described, it was the largest sauropod known from China. Young and Zhao estimated the mass of "M. hochuanensis" at . However, later volumetric mass estimates are lower at .