bluppy wrote:the 4 Chinese characters indeed literary means "exit, enter, peace, and safe"
it's a common saying in Chinese that actually means "be save on your journey" or "when going out, or staying at home, may you will always be safe and sounds"
some household put poster with that saying on their wall
or place a small accessories in their car with the same saying, etc
so i think it's more related to Chinese culture idioms than Buddhism