An attendant introduces the information of the tram network to a citizen in Hunnan New District of Shenyang, capital of Northeast China's Liaoning province, Aug 15, 2013. The tram network in Hunnan New District, China's first modern tram network, including four lines with the total length of 60 kilometers, began trial operation on Thursday and is expected to be put into official operation on Sept 15. [Photo/Xinhua]