Well it depends where you are from. If you are from China it would be, but you would say it, you chong muy. In English language I'm not sure!
The interjection in the sentence is "Hey." It is used to call attention or express surprise.
Hey
"Hey" (like "hello" or "say") is an interjection or exclamation. It has no sentence structure but its context can sometimes be implied by its tone. Example : Startled by the dropped oar, the boatman said "Hey!" and looked up at me.
Hey
Hey Dude!
like you can say example: hey do you think i wrote a good sentence?
hey, are you mavericking already?
Hey Zenith! Awesome! LOLZ
hey I like this it is apoplectic!
Hey, do you know what omnidirectional means?
hey hey hey i love you hey hey hey i love you hey hey hey baby hey hey hey baby ha ha ha lol ha ha ha lol ha ha ha blah blah blah ha ha ha blah blah blah
Hey Sorry Man, I was just jocund