We all know that Gwok Jing and Genghis Khan's youngest son, Prince Tolui, were anda brothers and great buddies throughout childhood, adolescence, and young adulthood, but how was Gwok Jing's relationship with the Khan's other three sons? From LOCH '82, Gwok Jing seemed to have good relations with Ogodei (second son) and was at least cordial with Chagahatai (third son), but Jochi (eldest son) always seemed openly hostile towards Gwok Jing.