Context: However, Reuters reported in June that, to date, Chinese prosecutors have joined an official inquiry into ten collapsed schools during May's devastating earthquake to gain first-hand material of construction quality at the collapsed schools, launch preliminary inquiries and prepare for possible investigations into professional crime. It was also reported that safety checks were to be carried out at schools across China after last month's earthquake.

Question: Why were the schools inspected?
Answer: to gain first-hand material of construction quality

Question: What was to be carried out at schools after the quake?
Answer: safety checks

Question: Who has joined an official inquiry into the school scandal?
Answer: Chinese prosecutors

Question: What investigation are the prosecutors pursuing?
Answer: professional crime

Question: Where are the Chinese going to perform safety checks?
Answer: schools across China

Question: What group reported that Chinese prosecutors were involved in investigating the schoolhouse collapses?
Answer: Reuters