Authorities in southern China have introduced new rules to restrict people from petitioning their grievances.

The notice, issued by law enforcement authorities in Shenzhen, prohibits 14 of what they call “abnormal” petitioning behaviors.

These “abnormal behaviors” include holding banners, distributing flyers, making silent protests, and holding sit-ins. Shenzhen residents are also prohibited from petitioning at Tiananmen Square or foreign embassies in Beijing.

Shenzhen, which borders Hong Kong, is one of China’s biggest financial and manufacturing centers. Its residents normally enjoy relative freedom compared to people in other cities.

But these new rules will allow authorities to severely punish petitioners who organize or participate in mass demonstrations. And repeat offenders may be sentenced to re-education through labor.

Public response to the new rules has been overwhelmingly negative. Critics say the regulations are aimed at suppressing local migrant workers who often have to petition for their rights. Some Internet commentators have asked why the freedom and democracy enjoyed in Hong Kong haven't rubbed off on nearby Shenzhen.