Correct

一张一弛

/ yī zhāng yī chí /
Strokes

Example

Definition

tense up and relax alternately; alternate tension with relaxation; balance work and rest

1
Wénzhīdào
文武之道
  
,
zhāngchí
一张一弛
  

The principle of the kings Wen and Wu was to alternate tension with relaxation.