2024 marks the 70th anniversary of the opening of the Sichuan-Xizang and Qinghai-Xizang Highways.

Over seven decades ago, a workforce of over 100,000, including builders from CCCC, carved roads through mountains and bridged rivers to construct the 4,360-kilometer-long highways on the "Roof of the World," with an average altitude of 4,000 meters. This engineering marvel not only revolutionized road construction but also ended Xizang's isolation from road transportation, paving the way for prosperity for the people in Xizang.

As participants, witnesses, and inheritors of the spirit of Sichuan-Xizang and Qinghai-Xizang Highways. CCCC builders contributed to surveying, designing, and constructing critical infrastructure such as the Nujiang Bridge, the Dadu River Bridge, the Feixian'guan suspension bridge, and the Tongtian River Bridge. They also took on the tasks of upgrading and maintaining the roads, continually infusing the spirit with contemporary significance.

Over the past 70 years, CCCC builders have remained rooted in Xizang, constructing roads, railways, airports, and ecological projects, significantly contributing to the region's development.

They successfully tackled core technical challenges in building and maintaining roads in high-altitude permafrost areas, ensuring the long-term stability of the Sichuan-Xizang and Qinghai-Xizang Highways. These roads still handle over 90% of Xizang's freight transport. Leveraging these technologies, the world's first high-altitude permafrost expressway, the Gonghe-Yushu Expressway in Qinghai Province, was completed in August 2017.

On October 31, 2013, the Metok Highway was fully opened, ending the county's history as the last in China without road access.

In May 2016, the Polonggou grand bridge, the largest span bridge in Xizang, was inaugurated.

On August 21, 2021, the Nagqu to Yangbajain section of the Beijing-Xizang Expressway opened, becoming the world's highest-altitude expressway.

On December 18, 2024, the Lhasa-Zedang Expressway (S5 line) was opened, significantly reducing travel time, facilitating tourism, and boosting local agricultural and pastoral industries. Its key project, the Guigala Tunnel, is now the longest high-altitude highway tunnel in the world.

What was once an arduous journey into Xizang has transformed into a multidimensional transportation network, seamlessly connecting the region through roads, airways, and railways, linking millions of homes in Xizang to the world.