Research on the transformation and upgrading of China's industrial structure since the reform and opening-up 并列题名：Research on the transformation and upgrading of China's industrial structure since the reform and opening-up Research on the transformation and upgrading of Liaoning industrial structure from the perspective of trade structure optimization 并列题名：Research on the transformation and upgrading of Liaoning industrial structure from the perspective of trade structure optimization Research on the carbon emissions effect of China's industrial structure change under trade opening Research on transformation and upgrading of Chinese ports oriented to one Belt and one Road Research on transformation and upgrading of China's processing trade enterprises Research on the changes of Chinese brand culture since reform and opening up Research on the transformation and upgrading of China's marine industry Research on the transformation and upgrading of open economy under the new situation in China