Four budget hotels in Shanghai have been fined for having poor hygiene, the Shanghai health supervision department said.

In a recent citywide hotel inspection campaign, more than 400 economy hotel outlets were examined. Among them four hotels were fined for operating a business without receiving a public health permit.

The four hotels are branches of two well-known hotel chains. Two of them belong to the GreenTree Inns chain. The other two belong to the 7 Days Inn hotel chain.

The four hotels are required to apply for health permits, officials from Shanghai Health Supervision Agency said.

Nearly 30 percent of hotels checked were found to have hygiene problems. The hotels were asked to rectify the concerns within a certain timeframe.