Xingtu Family Letter

In a future era of energy depletion and frequent wars, the earth is trapped in a deadlock of resource involution. Shanghai Power Plant engineer Lin Shen saw the increasingly gloomy city, and with the obsession of finding a way out for future generations, he devoted himself to studying the concept of laser light sail interstellar navigation, planning to launch a true interstellar expedition for mankind towards Proxima b, 4.22 Light-years away. There is no faster-than-light travel and no time travel. All navigation and communication follow the special theory of relativity. A round-trip letter would take more than eight years. From formulas on paper to repeated experiments in the Gobi desert, from mutual suspicion among countries to putting aside disputes and joining forces to build ships, Lin Shen used his life as a bargaining chip to take the lead in building the lunar laser propulsion array, paving the way for a long project and paving the way for mankind to take the first step out of the solar system. The fathers buried their heads in the earth to pave the way, while the younger generations set sail on the sea of ​​stars. Daughter Lin Xingyao followed her father's ideals and boarded the Ark in her middle age, embarking on a lonely voyage of twenty-one years. The world is separated by heaven and earth, and the years are misaligned. Letters from home traveling between planets carry partings, longing, expectations, life and death, and connect the fate of two or even three generations. This is a civilizational migration that does not rely on miracles or saviors. In the face of the vast and cold rules of the universe, family affection is a bond that spans light years. Perseverance and inheritance allow human beings to always have the care and direction to move forward in the endless sea of ​​stars.