Correct

老本行

/ lǎoběn háng / 
Strokes

Example

As a Noun

old profession; profession one has always engaged in or been trained for

1
Tā
他
tuìxiū
退休
hòu
后
  
,
yòu
又
gàn
干
qǐ
起
le
了
bǔxié
补鞋
de
的
lǎoběnháng
老本行
  
。

In his retirement, he resumed his old profession as a cobbler.