AtthecenteroftheAsiaPacificeconomiccircle,HainanIsland,partofthesouthernmostprovinceofChina,isnotonlythelargestspecialeconomiczoneinthecountrybutalsoakeylinkonthe21stCenturyMaritimeSilkRoad,withreadyaccesstointernationalshippingroutesoftheSouthChinaSea.