Introduction to the Mining and Metallurgy Grand Canyon: The Statue of Chairman Mao is the famous Mining and Metallurgy Grand Canyon. After years of continuous excavation, the mountain has been deeply sunk, becoming the largest open-pit mining pit in Asia. The Grand Canyon has a maximum vertical height of 444 meters, a length of 2.2 kilometers from east to west, a width of 900 meters, and a cross-section of 1.08 million square meters. It is known as the largest mining pit in Asia. The mining machinery has disappeared now, but the park has left an exhibition area for them.