The total gross domestic product (GDP) of the three countries in 2011 amounted to 14 trillion U.S. dollars, which accounted for 20 percent of the world's GDP. What's more, they also have close cooperation in the division of labor in the global industrial chain.
"If the systems and rules of South Korea, China and Japan can be systematically integrated, the three countries' enterprises will acquire great convenience," Bark said.
He added that "a good business environment will be provided, which can lower the uncertainty of the companies."
However, although there is great significance in setting up a free-trade area among the three countries, Bark also noticed that big practical difficulties also existed because the countries all have their own considerations and concerns.
"In my opinion," Bark said, "bilateral discussions and agreements should be carried out and reached at first, then the trilateral consensus can be made."
Compared with the free-trade area among the three countries, the South Korea-China free-trade area is a more "natural" phenomenon, Bark said.
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