ㄧㄤˊㄔㄤˊyángchángㄒㄧㄠˇㄉㄠˋxiǎodào

羊肠小道
  1. 蜿蜒狹窄)​。羊腸小徑」。 登山只有羊腸小道極其」。

road as twisty as sheep's intestine (idiom)​; narrow and winding road, fig. complicated and tricky job
sentier en zig-zag