Complex sentence: He has two sons, Alexander Li Man-ying (born in 1977) and Peter Li Man-chun (born in 1979); both of whom graduated with first class honours from Cambridge University in Medical Sciences.
Split into simpler sentences: He has two sons, Alexander Li Man-Ying born in 1977 and Peter Li Man-Chun born in 1979. Both graduated with first class honours from Cambridge University in Medical Sciences.