42705
Most astonishing , cities beside the river like Yinchuan , Luoyang and Zhengzhou -- places few Americans have ever heard of -- are racing to become China 's next new regional urban center with almost hallucinatory building booms .
 location contains: China, Luoyang; location contains: China, Yinchuan; location contains: China, Zhengzhou
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: ethnicity, place lived, geographic distribution, company industry, country of administrative divisions, administrative division of country, location contains, person of company, profession, ethnicity of people, company shareholder among major shareholders, sports team of location, religion, neighborhood of, company major shareholders, place of death, nationality, children, company founders, company founded place, country of capital, company advisors, sports team location of teams, place of birth 
Text: {0} 
 Entity Pairs:  China, Luoyang; China, Yinchuan; China, Zhengzhou 
Answer:
 location contains: China, Luoyang; location contains: China, Yinchuan; location contains: China, Zhengzhou