China's first youth-themed animated film "Yesterday's Blue Sky" will be released nationwide in the summer of 2018. The film is adapted from the popular comic book of the same name by Pocket Chocolate and directed by Gudong director Xi Chao. The film is based on the small town of Lanxi in southern China. It tells the story of several high school students in the town, their growth experiences of dreams, friendship, family affection and first love, and depicts a youth story with a very Chinese style, fresh and beautiful.