Both Xingdao daily and Xingdao evening news have a special proofreading team responsible for preventing typos from appearing in the newspapers published every day. However, 2% of the articles published by Xingdao daily have errors, while Xingdao evening news has no such errors. 
The articles published in Xingdao evening news at least had typos before they were corrected at school.
 the proofreading team of Xingdao evening news is more efficient than that of Xingdao daily in finding typos.