Phantom only stayed on the earth for 1 year. After Xiao Shenma and Cpaing became good friends, Xiao Shenma told Cpaing that it could become a phantom, and helped Cpaing learn to drive the phantom and understand the phantom. Xiao Shenma also told Cpaing that it has only one year on earth and has a mission. So the phantom only stayed on the earth 1 year.