Complex sentence: The first successful exchange took place in May 2011, led by Fr. Jerome S.J. & Fr. Sebastian S.J when the Xaverians visited Shida Fuzhong High School, Kunming, and the Chinese students visited St.Xavier's in November 2011.
Split into simpler sentences: The first successful exchange took place in May 2011, led by Jesuit Frs. Jerome and Sebastian when the Xaverians visited Shida Fuzhong High School, Kunming, and the Chinese students visited St.Xavier's in November 2011.