What lies beneath
China DailyAn aerial view of Huangchengtai at the Shimao site. Archaeologists unearth details about glory of an ancient metropolis and strive to get a clearer idea of the colossal site's place in history, Wang Kaihao reports. Editor's note: A national comprehensive research program, launched in 2002, to trace the origins of Chinese civilization, has led to the excavations and studies of key sites that are about 3,500 to 5,500 years old. When people, in recent times, saw stone walls still standing meters high at the Shimao site, they sometimes confused them as a part of the Great Wall. Covering 4 million square meters on a terrace, nearly six times the size of the Forbidden City in Beijing, the approximately 4,000-year-old Shimao site is the largest city ruins of its era in China.