Drawing just one Mah-jong tile is the easiest and probably the most common method of reading. Without a storyline like when interpreting a layout, there are no tiles to compare and contrast. Simply interpret the tile as the answer to the question.
Alternatively, this method may be used repeatedly in succession to allow the tiles to tell a story.
The Tortoise symbolises the world or universe and its consciousness of the self. This may be a time when it is best to move slowly. Patience will be important. This is a symbol of slow and steady progress, prosperity, and longevity.