Alstom will supply its Optonix modular traction package, which has been developed specifically for the Chinese Market. Satee will provide proulsion inverters, auxiliary converters, brake resistors, master controllers, and traction motors, with key components supplied by Alstom.

The initial 33.8km phase of the east-west Line 4 is due to open in October 2015. The line will have 18 stations, 17 of which will be underground.