I also think the time which the article refer to is too early. I except china will surpass USA in economy in 2018-2020. I also see the comment quote some orgnization as saying china will surpass USA after 2025, I don't think so.
If my memory is not wrong, 2001 china gdp is about 1 trillion, 2010 china gdp is about 6 trillion, in the period, china average development rate is about 9 percents. And the same time, USA gdp grow from 8 trillion to 15 trillion. just think it, think of 7percents growth rate, current appreciation, inflation. In 2020 china gdp will be about 30 trillion, Usa gdp will be about 30 trillion too. That's my opinion. But we should keep grow, Usa too, USA have advantage, we also have own.
I am not to boast of these, gdp not meant all, we know we are behind USA in many domains, like science, life livelihood, education, military, but step by step, you know. If you have a good economy, many thing base on it will develop faster. The important thing is that we know our situation.