The expansion project of the North District of Urumqi International Airport is a national key airport construction project and the largest single building project in Xinjiang. After the completion, Urumqi International Airport will have 2 additional runways, and 177 parking spots for planes. Its level will rise from 4E to 4F (the highest level), and the annual passenger throughput will reach 48 million passengers. As an important international aviation hub covering Central and West Asia and bridging Eurasia, the renovation and expansion project has recently upgraded the steel roof of the T4 terminal.