What is the geomantic omen of Yuanmingyuan?

If the surrounding area of Yuanmingyuan is an excellent place for geomantic omen, the geomantic omen inside Yuanmingyuan is even worse. In the second year of Yongzheng (1724), Yong Zhengdi, who had just ascended the throne of the emperor, was in high spirits and planned to expand the Yuanmingyuan, a former garden given to him by the prince, so he called Zhang Zhongzi, the magistrate of Deping County, Shandong Province, and others to investigate the geomantic omen of Yuanmingyuan together. The geomantic gentlemen inspected the landscape of Yuanmingyuan, and finally reported excitedly to the emperor: the whole landscape is high and tortuous in the northwest, and gradually transits to the southeast. The trend and current of Long Mai are in the upper hand and the position of water supply in geomantic omen. This is the best place to build a royal garden.