Shen Kuo was not only a geologist; his memoirs list "regularities underlying phenomena" in magnetism, astronomy, and engineering.
Sunspots are caused by irruptions into its surface of the sun's deeper magnetism.
He was tall and muscular, a poet and an educated man, and a superb military tactician; yet he lacked the personal magnetism to gain and hold the loyalty of the common people.
So the Madam thought she got the magnetism she wanted.
