The Songshan area was referred to as Xikou during the reign of Emperor Qianlong in the Qing Dynasty. Located on Songhe Street near Water Gate No. 4， the Xikou Ferry had long been a trade/distribution center for commodities from across the island and， in its heyday， a port that inspired the development of Xikou culture in Songshan.In an attempt to extend the Blue Highway route， Taipei City Government completed the construction of Xikou Pier on December 15， 2009， restoring the overall scenic beauty to the adjacent embankment and waterfront footpath， with an additional pedestrian footpath that connects Xikou Pier and Keelung Evacuation Gate No. 4. Among the distinctive attractions in the neighborhood， the Rainbow Bridge， Songshan Ciyou Temple and Raohe Tourist Night Market offer cuisines and various entertainments that redefines Xikou Pier as an emerging tourist high spot.