并列题名：Grain price and spatial structure of the market in Qing Dynasty Grain price and spatial structure of the market in Qing Dynasty 并列题名：Development and spatial structure of services in China 并列题名：Study on the geo-political structure of Shang kingdom in Yin Dynasty 并列题名：Research on the social structure of pre-Qin Dynasty 并列题名：Gold and silver wares of the Ming dynasty 并列题名：Gugong studies and the political culture of the Ming dynasty 并列题名：Study on spread of opium in the late qing dynasty