Yellen said she wanted to go into the U.S.-China talks to address a major Biden administration complaint that Beijing’s economic model and trade practices put American companies and workers at an unfair competitive disadvantage by producing highly subsidized solar products, electric vehicles and lithium-ion batteries at a loss, dominating the global market. Chinese government subsidies and other policy support have encouraged solar panel and EV makers in China to invest in factories, building far more production capacity than the domestic market can absorb. She calls this overcapacity.
Throughout the week of meetings, she talked about the risks that come from one nation maintaining nearly all production capacity in these industries, the threat it poses to other nations' industries and how a massive rapid increase in exports from one country can have big impacts on the global economy.