Re-Evaluation of China’s Service Trade Competitiveness: A Global Value Chain Perspective China-U.S. Trade Balance from the National Income Perspective Value-Added Trade and Evolution of China's Comparative Advantages China’s Service Trade and Dwindling Current Account Surplus Agglomeration Shadows amid China's Urbanization: From a High-Speed Railway Perspective Creating Inclusive Global Value Chains under the BRI from the Perspective of Public Goods Supply and Demand China's Position in Global Value Chains Compared with the EU, U.S. and Japan Global Value Chain Optimization Effect of the Belt and Road Initiative——From the Perspective of Improving Participating Countries' Position in the Division of Labor Impact of trade promotIon agencIes on chIna‘s export BInary margInal growth How Trade Liberalization of Intermediates Contributes to China's Technology Upgrade