No working out! Tianjin Metro warning sign amuses netizens

Warning signs are very common in public areas, but a sign made by Tianjin Metro recently went viral online, people.cn reported.

A netizen posted a photo of the sign on Weibo on August 12, in which four rules are listed: no vending, no begging, no performing for money and no working out.

The sign soon caught the attention of Chinese netizens who thought the last tip was "amusing but necessary."

A web user even made a perfect conclusion: "Ban all things that have nothing to do with taking the subway."

A child was recently caught doing pull-ups on Metro Line 3 in Tianjin, which many thought was dangerous.

"The subway is not a playground, so 'no working out' is reasonable," a netizen commented.

What do you think?