Beijing police are placing signs in the front of restaurants warning customers that warn customers “Criminal Activities Are Frequent Here”.

“It’s like the restaurants, rather than the policemen, are more responsible for customers’ security,” said one manager of a rice noodle restaurant on condition of anonymity, adding that the sign, which has been on the door for more than a month, has affected business.

The police believe that the signs are necessary to beef up security for next years Beijing Olympics. Although restaurant owners say the signs are effecting their business.

“We usually put warning signs on restaurants where more than two crime cases occur every month,” said Jiang Yuwei, deputy head of Jianwai police station, adding that the sign will be removed if no crime is reported within a month.

Read more: Crime signs on restaurant doors spark controversy in Beijing