枝末生根

Explanation: Trees take root on the branch tips. Analogy substandard affair, impossible. 　　Source: Qing Wang Fu-chih, "Jiang Poetry 'roll transforms under the ... ... a collection of poetry among the four four income, non-back-into bamboo Well snakes and worms What? Two things of life, without there succeed under Tajiri, Zhimo root truth. "