Chungyuan Sacrifice (the seventh full moon in a lunar year) is the most important annual folklore sacrificial festival in Keelung, and the major site to hold the sacral ceremony is Chupou Altar. Early on, it was built on Hsinshi Street or Tsaowei store street, but it has been moved to Jhongjheng Park with much larger scale and more modern sense. At the three-story Chupu Altar, you may overlook the whole Keelung area. In its front floor, there is a museum where has a collection of historical relics regarding Chungyuan sacrifice. The collection includes the rituals and articles used in Chungyuan Sacrifice. It also exhibits diversified Chungyuan Sacrifice items, so it is very valuable for you to come to explore. There is a lightning ceremony on the 15th of July in lunar calendar, this activity always brings the public's ardent participation of Chupu Altar's ritual to a new high.