[鸿沟 / 鴻溝, hóng gōuㄏㄨㄥˊ ㄍㄡ] wide gap; gulf; chasm; lit. name of old canal in Henan that formed the border between enemies Chu 楚 and Han 漢|汉, See Also: 楚, 漢, 汉#26357
[哀鸿遍野 / 哀鴻遍野, āi hóng biàn yěㄞ ㄏㄨㄥˊ ㄅㄧㄢˋ ㄧㄝˇ] lit. plaintive whine of geese (成语 saw); fig. land swarming with disaster victims; starving people fill the land#90576
[燕雀安知鸿鹄之志 / 燕雀安知鴻鵠之志, yàn què ān zhī hóng gǔ zhī zhìㄧㄢˋ ㄑㄩㄝˋ ㄢ ㄓ ㄏㄨㄥˊ ㄍㄨˇ ㄓ ㄓˋ] lit. can the sparrow and swallow know the will of the great swan? (成语 saw); fig. how can we small fry predict the ambitions of the great?#174273