Yes, this gong comes with a gong mallet. No need to worry about that.
The White Gong is not literally white.
In fact, some also call it the Double Light Gong, by those in China who name gongs, but it is neither a double gong, nor lighter than other gongs of its type, so we do not know why it is so.
This we do know:
The White Gong is similar in design to the Chau style gong. It has a rim to focus the sound.
It is fully lathed like the Wind Gong, so you can get a bit of a splash if you want it.
However, given the special way the gongmakers make this gong, it gives you a special sound of its own.