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Pu Zhang estimated that , in 1997 the total Korean investment actually utilized in Weihai would possibly break through 100 million US dollars , the value of imports and exports traded to Korea would be 1.5 billion US dollars , and the value of processing trade with Korea would be 1.4 billion US dollars .
 Pu Zhang, 1997, Korean, Weihai, 100 million US dollars, Korea, 1.5 billion US dollars, Korea, 1.4 billion US dollars
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 Pu Zhang, 1997, Korean, Weihai, 100 million US dollars, Korea, 1.5 billion US dollars, Korea, 1.4 billion US dollars