Time is a flowing river, winding but with its own specific track. Following its own direction, it gallops, and a person's life spans from a screaming birth, to a high-spirited young man, to a mature and prudent middle-aged man, to an old age when he knows his destiny and obeys his destiny. An irreversible sequence of twists and turns, all the way to death. From birth to death, this is a long process. People are wondering, people are struggling. Facts have proved that time will not flow back because of anyone's strength, nor will it be short because of one's insignificance. Destiny is what people pursue and try to change in just a few decades.