One of the EIGHT-IMMORTALS, he’s a total oddball. And why not? Living forever must get very boring unless you mix things up a bit.
In this case LAN-CAIHE mixes it up a lot. He was originally a busker, beggar and herb seller, and usually drunk. He was also very effeminate, and may even have been a female transvestite.
His or her fortune changed dramatically after helping a beggar (whom rumor suggests may have been LI-TIEGUAI in disguise). LAN-CAIHE washed his boils and sores, nursed the crippled beggar back to health, and was rewarded with immortality.
With a bizarre dress sense, LAN-CAIHE wears only one boot, and a belt made of wood. In the summer he wraps up warm with a thick coat, but this is discarded in the winter in preference for sleeping semi-naked in the snow.
This all begins to make sense when you realize he (or she) is the patron deity of the impoverished.