https://finance.yahoo.com/news/apple-launches-300-million-green-005713969.html > Apple's chief executive Tim Cook earlier this year called for calm heads in Washington and Beijing as the world's two largest economies have veered towards a trade war and exchanged tit-for-tat tariffs on billions of dollars of goods. > The U.S. firm makes most of its products in China, which are shipped around the world, including to the United States. China is also one of Apple's most important end markets, although it has faced a rising challenge from local smartphone rivals.