China, the world's second largest economy, today revised the size of its economy in 2015 to 68.91 trillion yuan (that is, 9.96 trillion US dollars), up 354.6 billion yuan from its preliminary figure.The National Bureau of Statistics (NBS) said economic growth for 2015 was unchanged at 6.9 per cent but the size of China's economy in 2015 has been revised to 68.91 trillion yuan (9.96 trillion U.S. dollars), up 354.6 billion yuan from its preliminary figure.The value of the primary industry was revised down to 6.09 trillion yuan in 2015, with the growth rate remaining at 3.9 percent. The value of the secondary industry was revised up to 28.2 trillion yuan, an increase of 148 billion yuan on the preliminary figure, with annual growth revised up to 6.2 percent from 6.1 percent.The value of the tertiary sector was revised up to 34.62 trillion yuan, with growth reaching 8.2 percent, as per the report.China's economic growth rate objective has been set at 6.5 percent to 7 percent in 2016, with an average annual growth rate of at least 6.5 per cent through 2020.