Three Asian partners reshape their ties

South Korea is quickly overtaking Japan as China'sregional trading partner of choice as its automobiles and electronics are snapped up by the world's second-largest economy, reports Yao Jing

Even as China, South Korea and Japan held the fourth round of talks in Seoul earlier this month for a trilateral trade treaty, some changes in the web of relationships linking the countries were developing under the radar.

One key change was that South Korea surpassed Japan last year to become China's biggest source of imports.