粤琼区域协同与海南自由贸易港建设
李国平, 徐祯

Regional coordination between Guangdong and Hainan and the construction of Hainan Free Trade Port
LI Guoping, XU Zhen
图7 2013—2018年粤琼引力强度指数变化
Figure 7 Change of gravity intensity index of Guangdong and Hainan Provinces, 2013-2018