(CNN) - President Obama's four-day visit to China was aimed at building deeper ties - and also spending time, albeit briefly, on family relationships.
In between his arrival in Beijing, China, on Monday and his informal dinner with Chinese President Hu Jintao a few hours later, President Obama met with his half-brother Mark Obama Ndesandjo.
"We just had a big hug. ... It was very, very powerful and very, very intense, because he's my big brother," Mark Obama said.
Mark Obama, who has spent the past seven years living in southern China, recently wrote a semi-autobiographical book titled "Nairobi To Shenzhen."
In it, he claims that he was often physically abused by his father, Barack Obama Sr.