If you don't know already China has a big issue on its hands with many of its milk products being tainted.
Since South Korea is China's neighbor it is no wonder that South Koreans are taking precautions against Chinese milk products. I personally haven't seen products disappearing from shelves. But when I do go to the store I think I will check the labeling to see if it is a milky product from China.
Anyways here is a video to spike your interest: