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"Foreign convenience store chains have well-developed supply chains, thanks to their long experience in the sector. Many stores have been able to increase their gross profits by upgrading products, structures and by raising the proportion of fresh food. And most of their fresh food comes from self-owned brands," he said.

"For one thing, they have not defined what innovative leadership means to them; for another, they generally don't know how to measure or reward it," he said.

"France calls on the United States to reverse the announced measures," he added.

"Finding ways to boost labor-force participation and productivity growth would benefit Americans and should remain a national priority," Powell said.

"French goods or services of good quality, or with French characteristics, are especially welcomed in China," she noted, adding that products made in France, such as wine, perfume, cheese, are already well known in China.