SYDNEY —China’s state-owned enterprises may be curbing investment in Australia is dropping as relations between the two countries deteriorate, but there are rising concerns that they may be stepping up community infiltration instead. Reports suggest that the Covid-19 crisis may have led to an upsurge in activity by agencies run by Beijing and the Chinese Communist Party (CCP) such as the United Front, a body President Xi Jinping once referred to as his “magic weapon.” “The Chinese Communist Party is strengthening its influence by co-opting representatives of ethnic minority groups, religious movements, and business, science and political groups in China...