According to the South China Morning Post, showing videos to Ding Ding could actually harm his eyesight. Basically, too much screen time might lead to permanent eye damage, which could make life pretty stressful for the chimp. “If a chimp can’t see properly, it can’t interact with humans. And that could make him anxious,” a zoo worker told reporters. “We really don’t want that to happen.”

To get the message across, the zoo has put up a notice outside Ding Ding’s enclosure. It shows a cartoon of the chimp watching a phone with his hands held out and the word “NO” written in big red letters. There are currently no penalties in place but visitors are being urged to respect the rule and not tempt Ding Ding with videos.