In May of 2004, Norinco won the contract to build ''Tehran Subway Line 4'' with Tehran Railway Company in Iran. The total amount of this contract is over 800 million (U.S. dollars) and is China's biggest international project contract to date. The project is estimated to take up to six years to complete. | In May of 2004, Norinco won the contract to build ''Tehran Subway Line 4'' with Tehran Railway Company in Iran. The total amount of this contract is over 800 million (U.S. dollars) and is China's biggest international project contract to date. The project is estimated to take up to six years to complete. |