A new type of bullet trains have been unveiled in north China's Hebei Province on Friday. The train can carry up to 616 passengers and crew members, with a maximum speed of 250 km per hour. It can run in bad weather and diverse environments, and also comes equipped with sealed compartments. This new type of bullet train has more than 600 sensors fitted on to monitor all aspects of its operation, and can also reduce its speed and stop automatically if necessary - and all the train's technology and key parts are made in China.