PARIS — France rolled out red carpets and honor guards for President Xi Jinping of China on Monday, but beneath the pomp, there were wary statements about China’s influence by his host, President Emmanuel Macron.

With Italy last week breaking from Europe in signing on to China’s global infrastructure project for moving Chinese goods, Mr. Macron has made it clear that a unified European response, in his view, is critical in dealing with the Chinese hegemon.

He reiterated that sentiment Monday as Mr. Xi listened in a deal-signing ceremony at the presidential Élysée Palace, where more than a dozen commercial and governmental treaties were signed worth billions of euros.

Earlier Mr. Macron welcomed Mr. Xi at a symbol of French imperial history and power, the Arc de Triomphe.