McDonalds has expanded aggressively in China since opening its first restaurant in 1990. It has opened many more locations, including drive-thrus and in rural areas. By 2008, McDonalds had 960 stores in China and over 60,000 employees. However, maintaining quality and sanitation standards in China's developing business environment has been a challenge. McDonalds focuses on strict control and monitoring of suppliers, transportation, factories and restaurants to ensure standards are met. An issue like detecting harmful substances in chicken nuggets in 2010 shows the importance of preventative measures and crisis response for future food safety problems in China.