A Chinese student has been melting hearts across the country's social networking site Weibo this week after pictures emerged of him carrying his friend around school.
Xie Xu has been helping out friend Zhang Chi, who has muscular dystrophy, for three years since they first met at Daxu High School in Xuzhou, Jiangsu Province.
Zhang's disease makes it very difficult for him to walk, meaning he needs assistance getting to and from school, as well as walking the halls between lessons.
Thanks to Xie's help, Zhang has never missed a class and is one of the top performers in his year group.
Deputy headmaster Guo Chunxi said: "The story of the two students is so inspiring and touching. They aren't family, but Xie has been doing this for three years. He's the most beautiful student.
"He also exerts positive influence on other students, who readily help Zhang. With their assistance, Zhang has never missed out on one single class."
The far-from-burly 75kg teenager carries his friend at least 12 times a day, for 200 days per year.
The pair both intend to go to university soon, although their dreams of higher education may drive them apart. Xie has been interviewing for a place at Nanjing Polytechnic Institute while Zhang prepares for his gaokao, the university entrance exam.