Most people can't tell 19-year-old Liao Bo underwent a left thigh amputation three years ago when they see him play basketball with his classmates.

Liao is one of the 120 students with disabilities from Beichuan Middle School, which lost more than 1,000 students and 40 teachers to the 8.0-magnitude earthquake in Sichuan province's Wenchuan county on May 12, 2008.

Liao is also known as "Crack Boy" because of a well-known online photo of him stuck in the crack of a collapsed classroom, waiting to be rescued.