Question: Are Xinxiang and Yongcheng both prefecture-level cities?
Sentence (from "Greater Changsha Metropolitan Region"): It covers an area of 1,883 km in the urban area with 5.92 millions of popupation, GDP reaches CN￥ 568.37 billions(US$ 90.04 billions), GDP per capita is CN￥ 96,067(US$ 15,665), the core area of three cities (Changzhutan metropolis) has an area of 483.77 km in 2012.
Relevant evidence: No