China will face great difficulty in achieving economic growth above 6.5 percent over the 2016-2020 period due to slowing global demand and rising labor costs at home, the China Securities Journal quotes a top state adviser as saying. Li Wei, president of the State Council’s Development Research Centre, made the comments at a conference over the weekend, the newspaper reported on Monday. “In the last 30 years of reforms and opening up, China’s gross domestic product has posted annual growth of around 10 percent.