Closing line of
白居易 《忆江南·其一》 (Bai Juyi, Tang, c. 830s, written long after his service as governor of Hangzhou and Suzhou):
江南好，风景旧曾谙。日出江花红胜火，春来江水绿如蓝。能不忆江南 (Jiangnan is fine - its scenes long familiar. Sunrise - river flowers redder than flame; spring - river waters greener than indigo. How can one not recall Jiangnan?). The ci that fixed
江南 in Chinese letters as the country of homesick longing.
