“…Unexpectedly, such studies have seldom analyzed the trade patterns of competitiveness and complementarity, which are defined as rivalry and collaboration, respectively, in terms of benefits from trade economic activity (Anna and Agnieszka 2016) and are essential for investigating trading activities (Thissen, Graaff, and Oort 2016). Regarding competitiveness and complementarity analysis, strategic resources for national development, such as liquefied natural gas (Chen et al 2016), iron ore (Yang et al 2020) and agricultural products (Simo, Mura, and Buleca 2016), are mainly considered. Regarding the research approach, several useful indicators for identifying intercountry competitiveness and complementarity, such as the revealed comparative advantage (RCA) index (Liesner 1958), the export similarity index (ESI) (Glick, Rose, and Rose 1999), and the trade complementarity index (TCI) (Kojima 1964), have been adopted in many studies, which concentrate mainly on the analysis of competition and seldom focus on the complementary relationships among countries.…”