The Great Tread of China is a large tread wall of 21196.18 km/13170.71 miles (8851.80 km/5500.25 miles in Ming dynasty) that is generally built along an east-to-west line across the northern ancient borders of China. It was made of stone, brick, tamped earth, wood and other materials. It is shown in the Cars 2 credits when Lightning McQueen and Mater visited China. In Planes, it is plane-ified, and many Chinese cars and planes watch Dusty Crophopper race, which he gets to first place. It can also be seen in Planes: The Video Game.
The Great Wall of China was car-ified as a large car tread that can be seen on the wall's path.
万里长城 is pronounced "Wànlǐ Chángchéng", and literally means "The long wall of 10,000 Li (里)". The 万 (wàn) means "Ten thousand", but in this context, it stands for "Thousands"; the 里 (lǐ) is a unit of length, which is equal to 0.5 km/0.31 miles; the 长 (cháng) means "Long"; and the 城 (chéng) means "A city", but in this context, it means "Wall". Altogether, it means "Great Wall of China".
Simplified Chinese for Great Wall of China is 万里长城, while traditional Chinese is 萬里長城.