lǎo​mǐ​fàn​niē​shā​bù​chéng​tuán

old rice cannot be kneaded into a ball

老米饭捏杀不成团 老米飯捏殺不成團 lǎo​mǐ​fàn​niē​shā​bù​chéng​tuán
old rice cannot be kneaded into a ball
Rice cooked from aged grains lacks stickiness and cannot be shaped into a ball; used as a metaphor to describe people who lack mutual affection and cannot be forced to live or work together successfully.