the film is based on light, from the light of science, the light of humanity and the light of divinity, tells the story of people living in the svalbard islands. different races, different cultures and different beliefs blend here, inherit and continue in love and love, show the beauty of human nature between reason and emotion, and coexist harmoniously between man and nature, and each of them is a "light speaker". in october 2017, liu yang, a phd in space physics in my country, embarked on his second polar journey. this time, he will be stationed alone at the yellow river station in the arctic of china, responsible for the observation of the polar spatial environment. arctic yellow river station is located at 78 north latitude