Liaoning is a province of the People's Republic of China, located in the northeast of the country. The modern province was established in 1907 as Fengtian or Fengtien province and the name was changed to Liaoning in 1929. It was also known as Mukden province at the time, for the Manchu pronunciation of Shengjing, the former name of the provincial capital Shenyang. Under the Japanese puppet Manchukuo regime, the province reverted to its 1907 name but the name Liaoning was restored in 1945 and again in 1954.
Liaoning is the southernmost part of Manchuria, the Chinese Northeast. It is also known in Chinese as "the Golden Triangle" from its shape and strategic location, with the Yellow Sea (Korea Bay and Bohai Sea) in the south, North Korea's North Pyongan and Chagang provinces in the southeast, Jilin to the northeast, Hebei to the southwest, and Inner Mongolia to the northwest. The Yalu River marks its border with North Korea, emptying into the Korea Bay between Dandong in Liaoning and Sinuiju in Korea.
--Introduction from wikipedia