Invasion of Oysters into Denmark

Denmark apparently never had native oysters. Now they have oysters that are alien to their environment and they exploded in population. 

So how do you solve this problem. This their solution

http://en.people.cn/n3/2017/0503/c90000-9210615.html

The statistic is that in 2016, 133 million Chinese traveled overseas. Not one sought asylum in their visiting country. All happily returned home because of human rights violations!