Chiang-su

Like the two preceding provinces, Chiang-su forms part of the Great Plain. It has few hills and is more abundantly watered than any other province.[…]Chiang-su was the main centre of the great Tʻai Pʻing rebellion, Nanking being the rebel capital from 1853 to 1864.

Source: wiktionary

But if, as we have seen, Wu's ambivalent attitude toward the conventional route to success originated in his early appreciation of the idealistic virtues of his father, then it is possible that parts of the work could have been written much earlier, perhaps even during his sojourn with his father in Chiang-su.

Source: wiktionary

In 1670 he became secretary to the magistrate in the southern province of Chiang-su; two years later he left southern China after obtaining a position as administrator for a wealthy friend, with whom he and his family resided for over thirty years.

Source: wiktionary