Century Avenue (simplified Chinese: 世纪大道; traditional Chinese: 世紀大道; pinyin: Shìjì Dàdào) is a major Shanghai Metro interchange station named after Century Avenue, which runs above the station. It is currently the only interchange on the Shanghai Metro network to serve four lines (namely Lines 2, 4, 6 and 9), and the first four-line interchange metro or subway station in mainland China.This station, first known as Dongfang Road station (东方路站), is part of the initial section of Line 2 that opened from Zhongshan Park to Longyang Road that opened on 20 September 1999. Beginning on 22 October 2005, the station closed for reconfiguration and improvements in preparation for the planned 4-line interchange with Lines 4, 6, and 9. On 28 October 2006, the station was reopened and first served as an interchange between Lines 2 and 4, and the name was changed to the present Century Avenue according to the new convention to name metro stations after famous streets or sights in the vicinity. The interchange with Line 6 opened on 29 December 2007 as part of that line's initial section between Gangcheng Road and South Lingyan Road, while the fourth interchange with Line 9, part of the line's downtown (Century Avenue to Yishan Road) section, opened on 31 December 2009.The station uses an optimized interchange solution. Line 6 uses two side platforms on the upper underground level and heads north-south, while Lines 2, 4 and 9 all use island platforms on the lower level and head east-west.