Singapore’s Sapphire Corporation Limited has secured a $200 million rail infrastructure construction contract through its recently acquired subsidiary, Ranken Infrastructure Limited. China-based rail engineering company Ranken Infrastructure Limited was acquired by Sapphire Corporation Limited in September 2015. The company has secured a contract to develop a 2.3 km section of the Guiyang Metro Line Phase I and to construct underground stations and a tunnel for the Qingdao Metro Line.