Key companies can resume work in coronavirus-hit Wuhan, China announced Wednesday, in another sign authorities are confident they are winning the battle against the epidemic as they seek to revive the economy. The decision came a day after President Xi Jinping paid his first visit to the capital of Hubei province since it was placed under lockdown in late January after the outbreak became a national emergency. The number of daily new cases has fallen steadily in Wuhan in recent weeks, while all other cities in Hubei have reported zero fresh infections for several days in a row — prompting Xi to declare that the spread of the virus has been “basically curbed” in the province.