In a family courtyard in an aerospace city in the north, seven only children, including Huang Yingzi and Jiang Yi, are better than siblings. They grew up together and helped each other. They became sworn brothers as “Big Dipper” and agreed to take the college entrance examination to Beijing together.The age of seventeen comes quietly, and the college entrance examination rushes in with the wedding ceremony of eighteen, and the youthful promise disappears.Huang Yingzi went to Beijing, Jiang Yiyuan left for the United States, and his friends were scattered all over the country, forgetting each other in the world.

“Who do you like when you are seventeen” has become a mystery that lingers in the hearts of seven people, and it is also a lingering green memory.The first decade of the new century is about to pass. As they first entered society, they were bruised and bruised in the struggle between ideals and reality. Their once pure feelings were like shining stars in the night sky.Yingzi wanted to reunite with “Qixing”, only to realize that “Who do you like at age 17” was a questionnaire that she had to answer, and the answer sheets for Jiang Yi and other friends had already been submitted.