Definitions

1. 1. different trades, worlds apart (idiom)
2. 2. to sb outside the profession, it is a closed book
3. 3. if you are not in this industry, you will not understand how it works

Components

• 隔行 gé háng – to interlace
• 如 rú – as
• 隔山 gé shān – half-sibling relationship