Study on the international trade policy and changes in developed countries 并列题名：Study on the international trade policy and changes in developed countries Study on the issue of foreign trade and poverty alleviation of the least developed countries 英文题名：International trading system and developing countries 并列题名：Study on the issue of foreign trade and poverty alleviation of the least developed countries Study on management mechanisms of R&D program in developed countries Study on the economic and trade policies of the South Pacific island countries international finance and developing countries Policy for international education cooperation and exchange in eight belt & road countries Study on the corporate social responsibility of the automative corporations in the developed countries