It is said the new crystal glass made of polyvinyl chloride will prevent windows from breaking into pieces and is acid and alkali-resistant.
Trains running in the Xinjiang Uygur Autonomous Region constantly suffer strong wind assaults with sand and stones. Trains and passengers may be in danger if the windows break.
The other side of the train will be not put up with the new glass material. It is left clear for passengers to escape in case of accidents.