Daguang Building, also known as Balou, was built in the Ming Dynasty during the Jiajing Period (AD 1522-1566); when it was rebuilt during the Tongzhi Period (AD 1862-1875) in the Qing Dynasty, three platforms were added on both the north and south of the building. The officials of the Ming and Qing dynasties were here to inspect the grains transported through the Grand Canal, so it was also called Yanliang (Grain Inspection) Building. Devastated more than a century ago, the building was reproduced on the west bank of the Grand Canal near its site at the beginning of the 21st century, bearing its original name.