China, economically extremely backward before 1949, has become one of the world's major economic powers with the greatest potential, and the overall living standard has reached that of a fairly well-off society. In the 22 years following reform and opening-up in 1979 in particular, China's economy developed at an unprecedented rate, and that momentum has been held steady into the 21st century. In 2004, the government further strengthened and improved its macro control, and the economy entered its best ever development period of recent years. The gross domestic product (GDP) for 2004 amounted to 13,687.59 billion yuan, 9.5 percent higher than the previous year.