网页Hengyang (simplified Chinese: 衡阳; traditional Chinese: 衡陽; pinyin: Héngyáng; Mandarin pronunciation: [xə̌ŋ.jǎŋ]) is the second largest city of Hunan Province, China. It straddles the Xiang River about 160 km (99 mi) south of the provincial capital of Changsha .