Arbor Day originated in the United States in 1872. J. Stering Morton was the founder of Arbor Day. He once said famously, "If you seek my monument, look around you." Trees are the best monuments. They live forever and last for generations. Therefore, another American, Lucy Larcom, said, "He who plants a tree plants hope." Deng Xiaoping planting trees with his children is the best proof of this sentence.