based on the comparison of foreign-funded enterprises in Beijing-Tianjin-Hebei region 农业转移人口就业研究：基于京津冀地区外资企业的比较：based on the comparison of foreign-funded enterprises in Beijing-Tianjin-Hebei region Study on the development index of economic and social integration in Beijing-Tianjin-Hebei region Research on the allocation of innovation resources in the Beijing-Tianjin-Hebei region Study on the regulation and optimization methods of land use in Beijing-Tianjin-Hebei region Transfer pricing of foreign-funded enterprises and tax regulation in China