The staff of the Tianjin Blood Center managed to transport 300-milliliter p-type rare blood from east China's Jiangsu province within 30 hours in order to save an eight-year-old girl with congenital heart disease.

The girl, Yu Wenhao, is from northeast China's Liaoning province. She was found with p-type rare blood when she was to receive surgery in Tianjin, while all over China, only nine persons were recorded with the same blood type.

After three months' search, the doctors found P type rare blood in Jiangsu, but they then faced difficulty of transporting the blood because blood is usually kept in specialized container at the temperature of minus 80 degrees Celsius. If the blood is unfrozen, it will be fresh within a really short period.

Therefore, the medical staff precisely calculated the distance and time when the blood would arrive in Tianjin as well as at the hospital. Fortunately, Yu received the surgery at 1:30 p.m. and the blood was transfused to Yu's body three hours later.