WTO rules that prohibit this kind of discrimination. By 1984, the United States had become China's third-largest trading partner, and China became America's 14th largest. However, the annual renewal of China's MFN status was constantly challenged by anti-Chinese pressure groups during US congressional hearings. For example, U.S. imports from China almost doubled within five years from $51.5 billion in 1996 to $102 billion in 2001. The American textile industry lobbied Congress for, and received, tariffs on Chinese textiles according to the WTO Agreement on Textiles and Clothing. In reaction to the 1989 Tiananmen Square protests' suppression, the Bush I administration and Congress imposed administrative and legal constraints on investment, exports, and other trade relations with China. The Clinton presidency from 1992 started with an executive order (128590) that linked renewal of China's MFN status with seven human rights conditions, including "preservation of Tibetan indigenous religion and culture" and "access to prisons for international human rights organisations"—Clinton reversed this position a year later. Other challenges to Sino-American relations in this decade included the investigations into Chinese nuclear espionage which produced the Cox Report, the persecution of Taiwanese-American scientist Wen Ho Lee for unproven allegations of espionage for the PRC, and the 1999 United States bombing of the Chinese embassy in Belgrade. But relations warmed after the September 2001 initiation by George W. Bush of the War on Terror. Conditions These changes were difficult steps for China and conflicted with its prior economic strategy. Accession meant that China would engage in global competition according to rules that it did not make. China's admission was "an enormous multilateral achievement" that marked a clear commitment towards multilateralism. When China joined the WTO, it agreed to considerably harsher conditions than other developing countries. After China joined the World Trade Organization (WTO), its service sector was considerably liberalized and foreign investment was allowed; its restrictions on retail, wholesale and distribution ended. Banking, financial services, insurance and telecommunications in China were also opened up to foreign investment. Furthermore, China had to deal with certain concerns linked to transparency and intellectual property that the accession to WTO underlined. Non-market economy Under Article 15 of the protocol by which China joined the WTO, China was recognized as a Non-market economy (NME). This status allows special treatment within the WTO. The status was set for 15 years and has been disputed after 2016, the year when the 15 years had