In 1998, Miyawaki piloted a project of reconstruction of a forest dominated by the Mongolian Oak (Quercus mongolica) along the Great Wall of China, gathering 4000 people to plant 400,000 trees, with the support of the Aeon Environment Foundation and the city of Beijing. The first trees planted by groups of Chinese and Japanese, on areas where the forest had long since gone, had grown over 3 m high in 2004 and - except for one part - continued to thrive in 2007.