Research on the development and spatial layout of high-class service industry in Beijing 并列题名：Research on the development and spatial layout of high-class service industry in Beijing Research on the development of high-end service industry in BeiJing 并列题名：Research on the development of high-end service industry in BeiJing Research on the development model of technology service industry Research on the development of high-tech industry in China Research on the development of high-tech industry in China. Research on the development of digital creative industry in China Research on the development strategy of China's modern service industry research on the development of the dairy industry in China