Complex sentence: The diplomat Zhang Qian suggested to the emperor to establish official relations with the western states, hoping that the Wusun would resettle in the Hexi Corridor and form an alliance together against the Xiongnu.
Split into simpler sentences: The diplomat Zhang Qian suggested to the emperor to establish official relations with the western states. He proposed to try convince the Wusun in reoccupying their former territory in the Hexi Corridor and form an alliance with Han against the Xiongnu.