Correct

后脊梁

/ hòu jǐliáng /
Strokes

Example

As a Noun

back (of the human body); backbone; spine

1
méiyǒu
没有
zuò
cuòshì
错事
  
,
不怕
biéren
别人
chuō
hòu
liáng
脊梁
  

I did nothing wrong, and therefore I'm not afraid of being ill spoken of behind my back.