many scholars have conducted research on the trade
potential and trade efficiency of the "Belt and Road"
countries. First of all, in the development trend of
trade efficiency and trade potential, scholars have
reached inconsistent conclusions. Through the study
of bilateral trade, he (Zhang, 2017) concluded that
trade efficiency is now low, and gave suggestions on
how to increase outward direct investment and sign
free trade zones; The paper was used (Li, 2018) by a
stochastic frontier model in the analysis and
calculation of trade efficiency and trade potential of
countries along the "Belt and Road" to conclude that
although trade efficiency is declining, there is an
overall upward trend; When calculating the trade
potential of countries along the "Belt and Road"
based on the stochastic frontier gravitational model,
it is believed (Quan, 2019, Gao, 2019) that neither
trade potential nor trade efficiency has reached a very
high level, and there is still a high room for
improvement. In the study on the development scope
of trade efficiency and trade potential, the paper was
used (Li, 2020, Ni, 2020) by the HT model to measure
the countries along the "Belt and Road", and
concluded that China's trade potential for Asian
countries is small, while its trade potential for Central
and Eastern European countries is large.
In terms of the selection of explanatory variables,
it is believed (Feng, 2019, CHEN, 2019) that some
economic indices, the total number of countries,
political systems, and preferential trade agreements
are important factors when influencing trade
efficiency and potential; Based on the study of
stochastic frontier gravitational models and trade
inefficiency models, it is concluded (Li, 2019, Lü,
2019) that signing free trade agreements and opening
Confucius Institutes is conducive to China and the
"Belt and Road" in improving financial freedom,
infrastructure construction, cultural exchanges, etc.
The improvement of trade efficiency in countries
along the Belt and Road; Based on the study of trade
potential based on the stochastic frontier gravitational
model, it is concluded (Zhang, 2020, Zhang, 2020,
Chen, 2020) that common language, trade freedom,
political stability, trade facilitation degree, and the
signing of free trade agreements can have a positive
impact on trade efficiency and potential; Based on the
stochastic frontier gravitational model, the study of
global trade efficiency and trade potential was carried
out (Chen, 2016, XIE, 2016, LIN, 2016), and the
study showed that trade input, trade concentration,
trade complementarity index positively correlated
trade efficiency and trade potential, and the degree of
trade diversification had a negative correlation with
it, but the impact of trade diversification, trade
concentration and trade complementarity index on
trade was not obvious; Based on the stochastic
frontier gravitational model and trade non-efficiency
model, it is concluded (Li, 2020, Zhang, 2020, Chen,
2020) that the scale of economic development of
countries and the import of final consumer goods by
participating countries have a positive effect on trade,
while differences in political systems and
geographical distance have a restraining effect on
trade; The paper was used (Li, 2021) by the stochastic
frontier gravitational model draw the conclusion that
the income level of countries along the "Belt and
Road" has a very obvious role in promoting trade
efficiency, and has a more obvious impact on trade
efficiency in terms of geographical location at the
same time. Trade freedom and tariff levels have a
positive effect on trade efficiency.
In the study (Yang, 2019) of influencing factors,
based on the stochastic frontier gravitational model
and trade inefficiency model, the income level,
population size, geographical distance and
landlocked countries restrictions between China and
the belt and road have a significant impact on trade
potential, trade inefficiency is the main reason for the
gap between the actual trade level and trade potential,
and helps to improve trade efficiency by narrowing
the gap between the democratic degree of
government, improving trade freedom and signing
regional trade agreements. The paper was used
(Zhang, 2017) by the study of stochastic frontier
gravitational model. It is concluded that there are still
major problems in trade facilitation and government
governance capacity of countries along the "Belt and
Road" that inhibit trade efficiency between countries.
In addition to enhancing the degree of convenience
and government capacity, China can promote the
negotiation of inter-state trade agreements and
increase of outward direct investment to improve
trade efficiency and trade potential; The paper (Li,
2021) was used by the stochastic frontier
gravitational model. It is concluded that the per capita
GDP, geographical distance, common border, WTO
organization, trade freedom and other factors of the
countries along the route have a greater impact on
trade potential and trade efficiency, while the
government integrity index, trade freedom, labor
scale, final consumption expenditure, and exchange
rate estimates have a significant effect on trade. The
innovation of its research is to conclude that tariff
levels are negatively correlated with trade and that the
role of financial freedom and OFDI in trade
efficiency is not a simple promotion, and this
indicator does not play a large role in China's trade
with countries along the route.