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That cleared the way for the debut in March of China 's first domestic low-cost carrier , Okay , which flies from Tianjin to Kunming and Changsha .
 location contains: China, Tianjin; administrative division of country: Tianjin, China; location contains: China, Changsha; country of administrative divisions: China, Tianjin
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, Tianjin; Tianjin, China; China, Changsha; China, Tianjin 
Answer:
 location contains: China, Tianjin; administrative division of country: Tianjin, China; location contains: China, Changsha; country of administrative divisions: China, Tianjin