The Xian H-6 (Chinese: 轰-6; pinyin: Hōng-6) is a licence-built[1] version of the Soviet Tupolev Tu-16 twin-engine jet bomber, built for China's People's Liberation Army Air Force (PLAAF). Delivery of the Tu-16 to China began in 1958, and a licence production agreement with the USSR was signed in the late 1950s. Xi'an Aircraft Industrial Corporation (XAC) manufactured aircraft at Xi'an as the "H-6"; the first flew in 1959. By November 2020, the PLAAF had as many as 231. The latest version is the H-6N, a heavily redesigned version capable of aerial refueling and carrying air-launched cruise missiles. According to United States Department of Defense, this will give the PLAAF a long-range standoff offensive air capability with precision-guided munitions. The first domestically produced H-6 was completed in 1968 and evidence of bombing training was recorded by U.S. spy satellites on August 13, 1971. By March of the following year, the CIA estimated that the PRC had 32 aircraft operational with an additional 19 awaiting completion. The H-6 was used to drop nine nuclear devices at the Lop Nur test site. However, with the increased development in ballistic missile technology, the nuclear delivery capabilities that the H-6 offered diminished in importance. The CIA estimated in 1976 that the H-6 had moved over to a dual nuclear/conventional bombing role. For details of further development, operational history and variants, click here.