Ten of the 44 injured people were seriously injured, according to local government.
A tower-crane truck lost control and crashed into a line of vehicles 50 meters away from the Lanzhou South Toll Station on the Lanzhou-Haikou Expressway at 7:21 p.m. in Lanzhou.
The truck driver, who was slightly injured in the crash, is under police watch and is being investigated. The driver said the vehicle had a brake failure in the continuous downhill section of the expressway. Cause of the accident is under investigation.The Gansu provincial authorities demanded examination on dangerous sections of expressways across the province.