The "Back Shadow" by Zhu Ziqing is a well-known essay in modern Chinese literature. It was written in 1925 and is a poignant reflection on the author's father and their last journey to the railway station. The essay focuses on the father's back shadow, which serves as a symbol of his love and sacrifice for his son.

The essay begins with the author's recollection of his father's appearance and personality. His father is described as a man who is somewhat short, with a round face, and dressed in a blue cotton robe, which was typical clothing for the time. The author notes that his father has a simple yet dignified appearance, but also mentions that he feels embarrassed when his father helps him buy fruits and snacks at the train station.

The central part of the essay revolves around the father's act of buying train tickets and helping the author board the train. The author describes how his father walks through the crowd to buy tickets, then helps him carry luggage and find seats. However, what deeply touches the reader is when the author sees his father's back shadow. In a moment of emotional intensity, he describes how his father climbs over a barrier to help him board the train, turning away from him so that he can only see his back shadow.

This back shadow becomes a powerful symbol of paternal love and sacrifice. It represents not only physical effort but also emotional support and care that goes beyond mere words. The essay concludes with an expression of deep gratitude towards his father for all that he has done.

Overall, "Back Shadow" is a touching piece that captures moments of everyday life with profound emotion. It has resonated with readers for generations due to its honest portrayal of family relationships and its ability to evoke feelings of nostalgia and gratitude.