More than 600 parents in China’s eastern Zhejiang province were shocked and furious after receiving a text message from their children’s school calling pupils “a piece of s**t,” reported China's Wenzhou Metropolis Daily on Thursday. The Wenzhou parents received a text message on Tuesday from Xin Ou primary school that said “this student is basically a stupid piece of s**t, how was he(she) ever born?” Angry parents asked school officials for an explanation, said the report. A school spokesperson said the message was the result of a software malfunction. The school had been using a software platform named “Education Baby” that allowed teachers to text parents about students’ performances. The system collapsed on Tuesday. Someone could have hacked into the system to send the malicious message, said the spokesperson. The school has issued a letter of apology to parents, who are still waiting for the results of the police investigation. “I actually think this is what some teachers truly believe,” said a netizen sarcastically on China’s micro-blogging service Sina Weibo. “The school needs to stop blaming others and face their own mistakes,” said another Weibo user.