Chinese authorities have formally reprimanded Walmart over food safety violations found at its Sam’s Club warehouse chain, according to a report by Inside Retail Asia.

The action followed a meeting between regulators and a Walmart executive, where recently detected food safety issues were discussed. The specific nature of the flaws was not detailed in the report, but the move underscores tightening oversight of foreign retailers operating in China.

Walmart has faced increased scrutiny in China in recent years, with authorities focusing on supply chain and labeling compliance. The Sam’s Club chain, known for bulk sales, continues to expand despite these regulatory headwinds.