Walmart China, parent company of Sam's Club China, said it will tighten controls after the country's top regulator summoned Walmart unit over food safety issues.

Walmart China, parent company of Sam's Club China, said it will tighten controls after the country's top regulator summoned Walmart unit over food safety issues.

Consumers browse products at a Sam's Club store in Changsha, Hunan province, on Sept 7. CHINA DAILY