面壁

Etymology
, the Buddhist monk credited with transmitting Chan (Zen) Buddhism to China, was said to have practised wall-gazing for nine years near the.

Verb

 * 1)  to sit facing the wall in meditation
 * 2)  to study or work with undivided attention
 * 3)  to face the wall (especially as a punishment); to stand facing the wall (to self-reflect)