The five most trustworthy social groups in China

The five most trustworthy social groups in China (out of a total of 49), in descending order are:  farmers, religious workers, sex workers, soldiers and students.  The source of this information:  a report from the Asian Times on the results of a national poll taken online.  Of these five social groups, I can say I am only familiar with students, and I can say they aren't trustworthy in the least.  So either China is a very corrupt country or the four top groups in China for trustworthiness are like the top four in the English Premiership heads and tails and whatever else about the rest.