Correct

挺直

/ tǐng zhí / 
Strokes

Example

As an Adjective

erect; straight; upright

1
Tā
他
tǐngzhí
挺直
dì
地
zhàn
站
zài
在
nàli
那里
  
。

He stood there straight/upright/erect.

2
Tǐngzhí
挺直
de
的
jiānbǎng
肩膀

straight shoulders

3
Tǐngzhí
挺直
de
的
bíliáng
鼻梁

straight nose

As a Verb

straighten up (physically); hold erect

4
Bǎ
把
shēnzǐ
身子
tǐngzhí
挺直

hold one's body erect; erect oneself to full height; keep one's back straight

5
Bǎ
把
bēi
背
tǐngzhí
挺直

straighten one's back