Siming district. Siming District is one of the six districts under Xiamen's jurisdiction and the earliest economic, political, cultural and financial center in Xiamen. Located at the southeast end of Xiamen, it has the largest single comprehensive fitness center in Xiamen, the comprehensive fitness center of Xiamen Sports Center and the oldest commercial street, Zhongshan Road Pedestrian Street. So the busiest downtown area in Xiamen is Siming District.