Group 1 - The article argues that extreme tariff measures by the U.S. will ultimately harm both the U.S. and its trading partners, as supported by historical and empirical evidence [1][7] - Historical economists, from Bastiat to List, have emphasized the importance of moderate tariffs and free trade for economic development, indicating that excessive tariffs can weaken domestic production capacity [1][2] - A study by French economist Philippe Aghion and others found that tariffs do not correlate positively with total factor productivity, while fiscal subsidies and tax incentives do [2][3] Group 2 - The article highlights that prior to joining the WTO, high tariffs on imported cars did not lead to a strong domestic automotive industry in China, demonstrating that tariff protection does not foster industrial progress [3][4] - Post-WTO accession, China has gradually reduced its average tariff rate to 7.3% by 2023, indicating a shift towards lower trade barriers [4] - The development of industries in Shenzhen, such as mobile phones and renewable energy vehicles, is attributed to market competition rather than tariff protection [5][6]