xiao zhengti , five , was born with a liver condition meaning he had to have his first major surgery at just nine months old , when mother haiying donated part of her liver , the people 's daily online reports .
but the boy 's body rejected the organ , leading to years of trips to hospital , until father xiao kunqing was allowed to donate 40 per cent of his liver yesterday , leading to a full recovery .
the rare condition occurs where the bile ducts around the liver swell during or immediately after birth , which can cause the tissue around them to scar .