I'm an ameture and don't know about all the rules in badminton. I was serving the backhand low service. But someone told me that I have to hit the shuttle when I totally release the shuttle. I debated with him that is totally impossible to serve if I don't release the shuttle totally.
Again he told me that I'm releasing the shuttle at last moment, not giving enough time to release the shuttle totally.
Now I want to know
Is there any rule that says that I have to give minimum x amount of time to release the shuttle entirely before serving?
Or what is the minimum interval time to serve after realising the shuttle?
I was practicing like told in the Youtube tutorial and I'm pretty sure I was doing as much possible exactly like that.