George Crumb所引用的中国诗人是谁呢？

George Crumb在An Idyll for the Misbegotten中要求长笛手边演奏边诵读“18世纪中国诗人Ssu-K'ung Shu“的诗句
"The moon goes down. There are shivering birds and withering grasses."
这是谁呢？