The Yang-tzŭ-chiang (揚子江) is about 3,300 miles long ; it is navigable for large steamers for 600 miles to Hankow (漢口) and for light-draught steamers 360 miles further to I-chʻang (宜昌). Above I-chʻang there are rapid which are difficult to pass.
1911, Ethel Daniels Hubbard, Under Marching Orders, →OCLC, page 75:
River streamers soon connected Nanking with Hankow, four hundred miles beyond, and finally, small steamboats sailed triumphantly up stream to I-ch'ang. Beyond I-ch'ang were the fierce rapids of the upper Yang-tzŭ, where foreign enterprise gave way before simple Chinese ingenuity.
Yangtzee[sic – meaning Yangtze]River Gorges, People's Republic of China. These gorges are most notable between I-chʻang and Feng-chieh, with cliffs 1,000 feet (320 meters) high.