China is sending doctors and medical supplies to Italy and other countries that have been hit hard by the coronavirus. WSJ’s Eric Sylvers in Milan explains how China is using soft power to change perceptions about its handling of the pandemic. Photo: Moura Balti Touati/Shutterstock Chinese President Xi Jinping has been on a telephone spree this month, dialing the leaders of coronavirus-battered France, Italy, Spain and Germany with offers of support, including masks and other medical equipment. One phone number he hasn’t tried is Donald Trump’s. The last time the leaders of the world’s two largest economies talked was in early February when the virus was ravaging China but not the U.S. The two talked about whether China would still buy as many farm goods as it promised in a trade deal. …