The circulation of the Yellow Sea and the East China Sea is simulated by means of the two layer numerical model with bottom topography: The circulation inside the Yellow Sea is mostly affected by the Kuroshio Current in the case without the wind stress exerting on the surface. The main current is trapped along the continental slope by the characteristics of geostrophy. The second strong current region is appeared from the southern coast of the Ghina to the Korea Straits, which is characterized the western boundary current. The circulation inside the Yellow Sea is rotated in clockwise direction even though its magnitude is negligibly small compare with the other current, for example, the tidal residual current.

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