A rare map of the first modern survey on Yuanmingyuan ... [Photo by Wang Kaihao/China Daily] Yuanmingyuan, also known as the Old Summer Palace, was first built in 1707. Covering over 350 hectares ...

Based on laborious studies by Guo and her students of the Old Summer Palace and maps drawn up in 1933, 1965 and 2002, the team became aware of how hills and water systems had changed over the ...