Chang is the bean cake, and Lee is also the bean cake

Overheard:

I read somewhere that somebody in China in the last 100 years taught the case of a Master who was enlightened by the inn keeper's daughter singing this song as she made bean cakes:

Oh, Chang is the bean cake,

And Lee is also the bean cake.

At night when you lay your head down upon your pillow,

A thousand thoughts may arise in your mind;

But when you awake in the morning,

You still continue to make the bean cakes.

 Making bean cakes is not a Zen teaching.  I don't hear the Master complaining though.