A worker works at Nanluoguxiang Station of Beijing's No 8 subway line on Dec 25, 2013. Nanluoguxiang Station, as part of the south extension of the Line 8, will open on Saturday. Line 8, which opened on July 19, 2008 as the Olympic Branch Line, had only four stations and 4.53 km of track. It was extended by six stations to the north on December 31, 2011 and by two stations to the south on December 31, 2012. [Photo: China News Service / Cui Nan]