South Korea Raises Concerns Over China's Yellow Sea No-Sail Zone

China has created a 'no-sail zone' in part of the Yellow Sea, where both China and South Korea have rights to the sea.

This means ships can't go there.

South Korea is worried because they think it stops ships from sailing freely.

They have told China about their concerns.

South Korea thinks it's probably because China is doing military training, but China hasn't said for sure.

They are also checking if China's actions follow the rules of the sea.

Some news reports also mention that China has built structures in the area which they say are for fish farming, but South Korea is concerned these could be part of a plan to take more control of the sea.