A tug of war over a Baidu Baike entry *erupted last week. On March 30, *paraxylene (PX), a petrochemical, was wrongly changed from low to highly *toxic in its entry on Baidu Baike. This happened before a protest against the construction of a PX plant in Maoming, Guangdong. Tsinghua students of chemistry managed to change it back and keep it that way. People’s Daily praised them for standing their scientific ground.