Yellow sea? Doubt it. Is this a Iceland/Greenland situation? What are those tourists doing? If I had paid a bunch of Yuan to go on vacation... I sure would not be happy to sit under a Coca-Cola tent with a gorgeous green sea lapping at my lounge chair. Chinese officials haven't a clue as to why the green monster has departed Boston and ventured eastward around the tip of Africa (If not even the Somali pirates wanted it, you know the algae it bad) and posted up on the eastern coast of China.
I wonder if their grandparents say, "When I was your age, I swam to school up hill both ways... and the water was blue" ?

