U.S. Treasury Secretary Janet Yellen began her visit to China, focusing on strengthening economic relations while addressing concerns over China's manufacturing overcapacity and its global implications. Yellen emphasized the importance of a level playing field for American workers and firms and the need for open dialogue. She criticized China's industrial subsidies and expressed concerns over China's green energy exports potentially harming American firms. The visit highlights ongoing economic tensions, particularly in sectors like semiconductors, green energy, and electric vehicles (EVs), with companies like Tesla and BYD mentioned in the context of the growing EV market.