A government transport official has urged bus unions “to stay calm” and not take industrial action after unionists slammed the import of mainland Chinese workers, concerned the move would set a precedent and affect the jobs of local bus drivers. Citybus Limited earlier said it will take on 20 drivers from the mainland following approval from the authorities. The company said the move would alleviate a consistent driver shortage and the imported labour would only be deployed for non-franchised services. But the city’s bus unions said they were outraged by the move and urged the company to raise…