Beijing ? China can boost public trust badly shaken by a spate of food safety scandals, including tainted formula that gave thousands of babies painful kidney stones, by enacting stricter laws and replacing its patchwork surveillance system, the U.N. said Wednesday.

The U.N. also recommended other changes, including more funding and training for food inspectors, in a 30-page paper released a day before the central government is to review its draft law on food safety.

The paper follows a scandal over tainted milk powder. In September, authorities announced they had found the industrial chemical melamine, which is used to make plastics and fertilizer, in infant formula. The substance was reportedly added to boost protein levels.

The deaths of four babies have been linked to the contamination, and about 54,000 children have been sickened.