China's Railway Rolling Stock Corporation (CRRC) Qingdao Sifang won the contract to develop a new type of train with a larger driving force and smaller turning radius.
The six-car train will run on Line 5 in Chongqing Municipality in southwest China.
Chongqing is a city of hills. The deepest section of the Line 5 subway is about 70 meters underground, making it the deepest metro line in China.
The train, with a carrying capacity of 2,322 passengers, can run at a maximum speed of 100 km per hour. The producer said it has contracted to make 39 such trains for Chongqing, state-run Xinhua news agency reported.
It has a 50 per cent better slope performance than the conventional trains.
Located in east China's port city of Qingdao, (CRRC) Qingdao Sifang designs and manufactures a variety of bullet trains, subway trains and trams.
Many of its products have special functions, for example, those adapting to extreme cold and high altitude or environmentally friendly hydrogen-powered engines.