There is such an umbrella, rainy day in the bus station waiting for the bus, summer evening when the sudden rain,
the first place to stop the square, can take the umbrella of the hand to improvise on the ground a dragon dance.
Every day in the square, several old people carry a small bucket of water, and grasp a brush as large as brush strokes.
Taiwan university of science and technology of Liu Xiangling was inspired from such a situation, design the
umbrella, umbrella handles, like a root penholder, bundle up like a brush, more interestingly, the umbrella with
special material, the water will turn black, anhydrous is white, just used umbrella hanging up, will appear above this
on the appearance of white with black, more like writing brush.