In the long history of mankind, people's understanding of freedom is completely different in different times. Step by step, people in each era traded huge sacrifices for the beginning of the next new stage, bringing a little freedom to the people. Now that human rights have been greatly respected, our understanding of freedom has become a need for a job you like, a life you want, and a home in a developed city. It seems incredible to people in any past era! I don't know how people in the future will think about the problems facing society today, but the problems must be solved well. The significance of history lies in letting people in the new era know the tremendous efforts of former people, and letting people in the new era believe that many things in this world will become reality, and our pursuit will surely be echoed! Looking back at the painful hurried and miserable past can also make people face the future positively. This is what an excellent film can finally leave to the audience through its reasonable storytelling. It doesn't have to be sad at the end, but sincerity, hope, kindness, and freedom lie ahead.