The contract involves 64 kilometres of roads and flyovers including a - 23.34 kilometre road from Mirijjewila to Sooriyawewa, an 18.28 kilometre road from, Sooriyawewa, Moraketiya to Embilipitiya, a 16.18 kilometre stretch from Ranna to Wetiya.
The firm will also build a 6.64 outer circular road in Hambantota, flyovers at Wetiya-Narnadagaswewa and an 18.53 kilometre road from Sooriyawewa to Wetiya.
He said the infrastructure would be part of a 'Hambantota hub' project, Rambukwelle said.
China has also financed a port and airport in Hambantota.