Hassan gives him a new version of the book Shahnamh
Amir frames Hassan for stealing money and a watch, knowing that Hassan will take the blame to protect him. Amir stands by and does nothing to stop it, thus indirectly getting both Ali and Hassan in trouble.
Amir put his watch and some money in Hassan's mattress. Hassan found these items and told Ali about how he got raped while Amir hid and watched, so they left Kabul.
Ali and his son Hassan left Baba's household in "The Kite Runner" because they were forced to leave due to the dishonor of Hassan's biological father, which created tension and conflict in the household. Amir frames Hassan for theft to get rid of him, leading to Ali and Hassan's departure as a result of the betrayal and injustice they faced.
He remembers that Baba never forgot Hassan's birthday and that on one of Hassan's birthdays, Baba paid to have Hassan's harelip surgically fixed. Amir recalls when he asked Baba if they could get new servants, Baba had gotten furious and yelled at Amir. He had said Hassan and Ali are part of their family and they are not going anywhere. He also remembers that when Hassan and Ali left, Baba wept and wept.
Hassan is Amir's half brother. Hassan's father, Ali, was like a brother to Baba so he lived with Baba. However, Baba impreganated Ali's wife and had Hassan who became good friends with Amir.
Ali Hassan Mwinyi was born on May 8, 1925.
Actually, they are half brothers. Amir had found out that when Rahim Khan had hinted that Ali was not Hassan's father but Baba was (which explains why Baba had a closer relationship to Hassan and Amir).
Baba shocks Amir by letting Hassan and Ali stay at the house, as Amir had put the wristwatch and Afghani bills under Hassan's mattress so that when Baba did find out about Hassan's stealing (a trait that Baba once told Amir he would never forgive in a person), Baba would want to push them out. Instead of Baba kicking them out, he forgave Hassan for "stealing" (he only admits stealing from Amir to protect him), and begs them to stay. Hassan and Ali leave the next morning and Baba weeps when they leave.
Ali tells Amir that Hassan mostly runs errands and does chores for him now, as he is getting older and can no longer do physical work like he used to.
Amir asked Hassan to leave the neighborhood and move away from the household, as it would be easier for Hassan to live a peaceful life without the burden of their complicated relationship and the secrets that were kept from him.
Hassan is revealed to be Baba's son, making him Amir's half-brother. Baba had an affair with Hassan's mother, resulting in Hassan's birth. This revelation adds a new layer to the complex relationships in "The Kite Runner."
In "The Kite Runner," Amir and Baba's surname is "Qadiri." Hassan and Ali are known by their first names only, without a surname mentioned, as they are Hazaras in the novel, whose surnames were often not deemed important in Afghan society. They lived in the town of Kabul.