Painted in inkwash.  When Ting-chih (Ku An) paints bamboo in wind, the leaves flutter gracefully, reflecting a gentle warmth within their firm, tensile strength.  This painting depicts new bamboo as they sprout fresh branches that stretch forth with the firmness of steel, and whose new leaves are taut as if one could hear them rustle in the wind.  The rock is brushed in swift strokes with the brushtip aslant, splaying the hairs and exposing the paper in textural swatches, infusing a sense of vital energy throughout the entire page.  It is a lofty work, refined and extremely beautiful.

Artist's inscription in the upper left-hand corner reads:  Written in the "Sui-han-lou" (Winter Pavilion) during the intercalary month of the year i-ssu (1365).  (Signed) Ting-chih.

In the top there are inscriptions by the Ching Emperor Kao-tsung, Chien-lung and by the collector Mo Chi.

On the right, Mo Chi writes in a regular script: 

The Virtuous Gentleman (Bamboo) has always resisted today's rain,
And of Old Men Rock, who will bow down before winds?
Only the sentiments of Wang Yu and Mi Fei
Can harmonize united across millenia.
Signed: Pai-pu chu-shih.  1 seal: Mo-shih Wei-kung.

The Chien-lung Emperor's poem reads: 

A fist of a rock, a few bamboo leaves,
No signers of silent contracts in the empty valley
A soft haze and gentle smoke waft in on the breeze,
Voices echo, energies revitalized.
1 seal: Chu-i tsai-kuang-chiu

This is the third leaf in the album "Ming-hua Lin-lang".

Ku An (active 1345 - 1373) was a native of Huai-tung in Chiangsu Province.  His tzu was Ting-chih.  Excelling in calligraphy, he was also admired for his bamboo painting which reveal energetic brushwork, where bamboo tips brush the clouds and where the brushwork is divine.  In calligraphy he followed the style of Chao Meng-fu.  His birth and death dates are not known.