McDonald’s (MCD.NYSE) has vowed to boost audits and review surveillance videos of suppliers after a food safety scandal has hit the fast food chain’s image and eroded its sales, Reuters reported, citing a Tuesday statement by the company. The firm has also created a new position to oversee food safety governance in China and will launch a hotline later this year for whistleblowers to report food safety issues. Last week, Chinese police arrested six staff from McDonald’s supplier OSI Group Inc [OSIGP.UL] following allegations in July that workers at a plant in Husi, Shanghai used expired meat and doctored food production dates. McDonald’s has since suspended supply from all plants in Husi.