Director shoots the inspirational story behind saving a young boy's arm, Xu Fan reports.

On April 30 last year, a race against time was taking place during a journey of more than 1,400 kilometers between Hotan prefecture, Xinjiang Uygur autonomous region, and Urumqi, the region's capital.

A 7-year-old boy had his arm severed by a tractor while he was playing in a field in Kumairik village. The crucial time to reattach his arm was within six to eight hours.

When he arrived at Hotan airport to fly to Urumqi for urgent surgery, the last available flight — China Southern Airlines' CZ6820 — was about to take off. With the coordination of airport staffers and flight crew, the airplane was called back to the terminal to pick up the boy and even adjusted the scheduled route to save around 10 precious minutes.