to take a roundabout route

• 绕道运输

  transport the long way round

• 绕道从山左面过去

  take a detour around the left-hand side of the mountain

• 回家的时候，我绕道上了一次邮局。

  On the way home I took a detour to the post office.

• 从北京绕道江西去广东。

  Make a detour to Jiangxi on one's way from Beijing to Guangdong.