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While China has long sought to cultivate closer ties with Saudi Arabia and other Persian Gulf countries because of its need for oil , a tour of China , India and other Asian countries this year by King Abdullah of Saudi Arabia and a state visit to Riyadh by President Hu Jintao in April have done much to encourage nonoil financial transactions between the countries .
 Saudi Arabia, Riyadh; Hu Jintao, China; Hu Jintao, China; Saudi Arabia, Riyadh; Saudi Arabia, Riyadh; Saudi Arabia, Riyadh
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; 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} 
Answer:
 Saudi Arabia, Riyadh; Hu Jintao, China; Hu Jintao, China; Saudi Arabia, Riyadh; Saudi Arabia, Riyadh; Saudi Arabia, Riyadh