A Pro-China online network is targeting Western companies mining for elements used to make smartphones and other hi-tech products, US cybersecurity firm Mandiant said in a report on Tuesday. China controls 80 percent of the world’s supply of rare earth elements, vital components for anything from electric vehicles to fluorescent lighting, and Western powers have been trying for years to redress the balance. Mandiant identified a network of thousands of fake social media accounts in 2019 that it has linked to several campaigns pushing pro-China messages and disinformation. The US firm’s report on Tuesday said the network, which it has...