Editor’s Note: As an ancient country, China has a long history of city planning, but it has never been so anxious for new theories and methodologies of city planning as it does today. In the past, in particular the feudalist period of thousands of years, China had seen the birth of numerous traditional cities all over the country, including the worldwide well-known metropolis like Xi’an in the Tang Dynasty and Beijing in the Yuan, Ming, and Qing Dynasties, most of which were laid out and built up strictly following the city planning principles stated in Zhouli Kaogongji, an important document that recorded the regulations of city construction dated in the West Zhou Dynasties. While in the contemporary time, in particular the decades after its opening-up and reforms in the 1980s, China has seen again the birth of numerous modern cities all over the country amid its rapid urbanization, which has never occurred before in the world in terms of speed and scale. However, facing the complicated actual problems and the continuously emerging challenges, neither the traditional city planning of China nor the modern city planning of the West would serve in an efficient way to provide guide for the sustained and healthy development of Chinese cities. As the largest laboratory of urban planning in the world in the 21st century, China calls for new theories and methodologies of urban planning and it is the historic mission of Chinese urban planners to make contributions with their knowledge and efforts, just like what Prof. WU Liangyong has done for exploring the Sciences of Human Settlements.