the US is not at all the only country responsible for the growth of China
China, refused to trade with other countries up until 40 years ago and the US was not the first nation to trade with China
Prior to the initiation of economic reforms and trade liberalization nearly 40 years ago, China maintained policies that kept the economy very poor, stagnant, centrally controlled, vastly inefficient, and relatively isolated from the global economy. Since opening up to foreign trade and investment and implementing free-market reforms in 1979, China has been among the world’s fastest-growing economies, with real annual gross domestic product (GDP) growth averaging 9.5% through 2018, a pace described by the World Bank as “the fastest sustained expansion by a major economy in history.” Such growth has enabled China, on average, to double its GDP every eight years and helped raise an estimated 800 million people out of poverty. China has become the world’s largest economy (on a purchasing power parity basis), manufacturer, merchandise trader, and holder of foreign exchange reserves. This in turn has made China a major commercial partner of the United States. China is the largest U.S. merchandise trading partner, biggest source of imports, and third-largest U.S. export market. China is also the largest foreign holder of U.S. Treasury securities, which help fund the federal debt and keep U.S. interest rates low.
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the US may be the largest trading power, but the US is also considerably larger population wise, then many other countries involved with trade.
ignorant remarks lead to more ignorance, so here is a link to educate anyone who actually cares about such things
LINK this will take you to an exhaustive fact based site that shows China's exports, imports on a country by country basis, put together by the World Integrated Trade Solution