What is the main content of "The Kite Runner"?

The novel "The Kite Runner" is told from a first-person perspective, telling the childhood past of an Afghan immigrant boy in the United States and his spiritual redemption process for his childhood mistakes as an adult. The protagonist Amir was born in Kabul in 1963 to a wealthy family. His father was a successful carpet merchant. Hassan, the son of Ali, the servant of Amir's family, was born in Hazara. Amir and Hassan are good friends and they often play games together. Amir is an excellent "kite fighter", that is, he is good at using his own kite to cut the strings of other people's kites; Hassan is an outstanding "kite chaser" because the Afghan tradition is to chase the kites that fall after the strings are cut. It's owned by people. Dad loves both children very much, but thinks Amir is too timid. When the two children fight, Hassan always takes the lead. Amir showed his talent for writing, but his father did not value him. Due to the selfishness of a child, the protagonist really wants to get all the love from his father, and therefore is always jealous of his father's tenderness towards his servant's children. The protagonist had a cowardly character when he was a child, while the servant's child was brave and loyal. The protagonist, who had an unbalanced mentality, later used dishonorable means to frame the servant's family, causing the servant's family to live in a foreign land. Later, war broke out in Afghanistan, and the protagonist's family was forced to leave the United States. Later, his father's partner knew the inside story, and before his death, he encouraged the protagonist to return to Afghanistan to find the servant child. Through his own efforts, he tried to calm down his years of guilt and learned a shocking lie from the seriously ill Rahim Khan. , Hassan is actually not the housekeeper’s biological son, Hassan is his father’s illegitimate son, that is, his childhood friend is actually his brother, and Hassan’s son who was bought from the orphanage into the hands of Assef is his nephew . His childhood nightmare recurred again, and he finally went through all kinds of hardships, rescued his nephew, and brought him back to his home in the United States.

"The Kite Runner" is the first novel by Afghan-American writer Khaled Hosseini and the first English novel written by an Afghan-American writer. It was published in 2003. It has topped the New York Times bestseller list for two consecutive years, has sold more than 20 million copies worldwide, and has been translated into 42 languages. The novel tells the story of two Afghan teenagers about friendship, family love, betrayal, and redemption. The novel not only expresses an indictment of the war, but also has a profound reflection on the ethnic and religious issues in Afghanistan. The novel received widespread critical acclaim but also caused huge controversy in Afghanistan. This is a novel with pure language but sincerity and touchingness, which has brought surprises to the American publishing industry that has never been seen since "The Lovely Bones". It has been adapted into a movie by DreamWorks.