LESS than a fifth of Shanghai residents would use the city food safety tip-off hotline, a survey has found.

When asked which number they would call over food safety problems, just 18 percent of those polled said they would choose the city’s 12331 food safety complaints hotline.

More than 81 percent of those questioned in the National People’s Congress education, science, cultural and health commission poll said they would not report food safety problems to the authorities.