Scammers pretending to be Chinese authorities are increasingly targeting international students in Australia, threatening “serious trouble” and 24-hour surveillance and fleecing them of more than $5m in just five months. The scammers claim to be Chinese law enforcement officers who demand that personal information or money be transferred to them. Some accuse students of criminal wrongdoing, such as receiving fake passports or credit cards. Victims may be told their identities are being used to commit financial crimes. In some cases, scammers say Australian authorities are planning to arrest and deport…