This is a story about you, a story about the world inside your body... According to the latest research, there are about 37 trillion cells in a person's body.They work silently in your body, building a busy and wonderful world.From red blood cells responsible for delivering oxygen to white blood cells that bravely resist bacteria, every cell plays an indispensable role. They may be small, but extremely tough; they seem simple, but they shoulder heavy responsibilities.On this stage that is invisible to the naked eye, an amazing drama of life is being staged every day—a story about struggle, sacrifice, collaboration and survival. This is not only a scientific exploration, but also a tribute to life.Those "little people" that we never notice on weekdays have always been silently protecting our health and vitality. This is an unexpectedly close and fascinating story - the life of cells in your body is also quietly weaving your life.