Claim: Pei County is in an eastern-central coastal province of South Korea, formerly romanized Kiangsu, with a population of over 1.3 million people.
Evidence: Pei County, or Peixian (simplified Chinese: 沛县; traditional Chinese: 沛縣; pinyin: Pèi Xiàn), is under the administration of Xuzhou, Jiangsu province, China, bordering the Shandong prefecture-level cities of Jining to the northwest and Zaozhuang to the northeast and sitting on the western shore of Nansi Lake. 
Peixian
沛县 1,290,500 
People's Republic of China