Study on the development index of economic and social integration in Beijing-Tianjin-Hebei region Study on the development index of economic and social integration in the Yangtze River Economic Belt 并列题名：Study on the development index of economic and social integration in the Yangtze River Economic Belt Research on the effect and mechanism protection of science and technology innovation in Beijing-Tianjin-Hebei region Study on the regulation and optimization methods of land use in Beijing-Tianjin-Hebei region Nual report on the development of finance in Beijing-Tianjin-Hebei region Construction of Beijing for the world city and the integration of Beijing-Tianjin-Hebei region Nual report on economic and social development in Beijing-Tianjin-Hebei Annual report on the development of finance in Beijing-Tianjin-Hebei region 并列题名：Nual report on economic and social development in Beijing-Tianjin-Hebei