setback for the Shanghai COVID battle; Beijing focuses on mass testing

– Shanghai reported 58 new cases outside quarantine areas – Beijing tests millions – The outbreak constitutes the biggest test yet of Xi's "zero COVID" strategy. SHANGHAI/BEIJING (Reuters) - China's commercial capital Shanghai took a beating on Monday as authorities reported 58 new cases of COVID-19 outside lockdown areas, while Beijing pressed to test millions of people over the Labor Day holiday. They were celebrating. Strict coronavirus measures in Shanghai have sparked a rare public outcry, with millions of the city's 25 million residents stuck in their homes for more than a month, some trapped inside fenced apartment complexes, and…