Beijing is the capital of the People's Republic of China. It is a direct-controlled municipality surrounded by nearby Hebei Province. Within northern China, the city acts as a major transportation hub. As of 2018, the Beijing metro system consists of 22 lines, 370 stations and 599 kilometers of track in operation, with average daily ridership around 10 million passengers. The Second-phase Construction Plan of Beijing’s Urban Rail Network (2015-2021) was approved in 2015. According to this plan, there will be 24 lines at a total length of 998 km in operation by 2021. The China Sustainable Cities Integrated Approach Pilot, together with the GPSC, will support coordination both at the national and city levels to further develop national policies, guidelines, strategies, and capacity building initiatives for integrated urban and transport planning. It will also provide technical TOD guidance and TOD implementation support. Specifically, this includes aligning construction plans and their operation schedules for better connection and integration of different public transit modes, such as metro, BRT and buses. According to the Asian Development Bank’s 2014 study of the most environmentally livable cities in China, Beijing ranked in the middle of the index. Together with Tianjin and Hebei, Beijing is part of a new mega urban region known as the Jing-Jin-Ji.