Turtle is a creature that can live up to several thousand years. It symbolizes longevity.
The dragon symbolizes career success and courage. It is sitting on a base of ingot and coins to represent prosperity and wealth.
One little baby turtle on the back also represents good beginning and wonderful descendants' luck.

How to place it?
You can display it almost everywhere you like (except bath room). Displaying it near to where you sit can enhance your relationship luck.
If you have arguing troubles, you can display it behind you. In this way, it can give you a good support.
Find your "Tian Yi" position(for health) and Display it there for longevity.