American efforts to curb advanced chipmaking in China are working, a top U.S. official said. The chip used in sanctioned Chinese tech company Huawei’s Mate 60 Pro smartphone is not as advanced as chips being made in the U.S., Secretary of Commerce Gina Raimondo said Sunday.

“What it tells me is the export controls are working because that chip is not nearly as good, … it’s years behind what we have in the United States,” Raimondo said in an interview on CBS’s 60 Minutes. “We have the most sophisticated semiconductors in the world. China doesn’t.”