At present, there were few researches directly related to our article, the authors would summarize contributions into three aspects: research topics, research theories and research methods.
In terms of research topics, the previous researches to import retail mainly focused on macroscopic perspective. Saipe (2013) used cross-border e-commerce sellers in United States and Canada as research samples and found that cross-border and domestic logistics costs have a significant impact on their profits. At the same time, the free shipping mode can increase the volume of cross-border e-commerce transactions in US and Canada. Hsiao (2017) has found that a satisfactory CBLS3 provider could promote cross-border e-commerce transaction volume. Liu (2015) proposed certain research proposals on the development of cross-border e-commerce and promotion of trade cooperation relations based on relevant bilateral trade agreements between China and Russia.