并列题名：Development mechanism of producer services industry for metropolises Development mechanism of producer services industry for metropolises 并列题名：Development trend of producer services industry and China's option Development trend of producer services industry and China's option 并列题名：On producer services industry in megalopolis 并列题名：Development of modern service industry in Guangzhou 并列题名：Development strategy of service industry in the new era The development of producer service industry Research on the mechanism of producer service industry for the strategic emerging industry Research on Co-agglomeration mechanism of producer service industry and its spatial effect