Hong Kong (CNN Business)Toyota and Volkswagen are gradually bringing their China factories back on line after they were closed for weeks because of Covid lockdowns. Toyota ( TM ) said on Monday it’s preparing to resume operations in Changchun, Jilin province — one of China’s largest auto manufacturing hubs — following a month-long pause.”We have been gradually preparing to resume operations in our Changchun plant since late last week,” the Japanese automaker said in a statement. “However, the timing for full-scale operation has yet to be determined,” it added.Toyota suspended production at its Changchun factory on March 14.Volkswagen ( VLKAF...