Do not say anything. Look at the internationally generated statistics. You have been given the reference. Trust in those statistics more than Chinese generated statistics.
http://m.theglobaleconomy.com/China/Exports/
Chinese export as % of GDP was 38% from 2008 to 2012 but declined to 24% in 2016 as per world bank. The latter because Chinese economy is on a decline mode in last three years.