I Watched the Migratory Birds Fly Away

15 Years is the journey of migratory birds flying back from the south... 15 Years is the process of growing up as an educated youth. Migratory birds can be retained in the reed jungle... Educated youth Xia and Nan Huitian... The handsome boy from Hangzhou University and the young girl from Agriculture and Forestry University have been in love for 15 years... Where do they go? Or go back to that summer. There is also the "Nan Chen Bei Zhang" group who silently protects them... Intention: I love you regardless of the date of return