The roller coaster, known as the "king of amusement machines", is an important symbol to measure the scale and grade of amusement parks. Tri-ring atomic pulley, also known as the mountain car, is a rail group car inertial sliding class of oversize entertainment machine. Its track is 498 meters long and consists of a vertical ring and two spiral rings with a height difference of 23 meters, all of which are reinforced. The train is made up of six cars and can seat 24 people. When the train is lifted to the high end of the ramp track, it immediately turns into a free glide. The huge potential energy causes the train to roll up and down the track, spiral through, and roar along with the wind and lightning, reaching speeds of up to 75 kilometers per hour. Tourists are firmly and comfortably fixed on the seat of the train by the safety device, and can feel at ease to enjoy the weightlessness, overweight and centrifugal state, and the thrilling strong stimulation, which is deeply loved by teenagers.