The center previously issued a notice saying it suspected another test because the epicenter was located on the surface

"However, in recent years, the Chinese government no longer tolerates the existence of polluting enterprises," he said

Opening up to the world has brought dramatic changes to the coastal regions, which have been more developed that the inland areas

The Obama administration had done everything it could to internationalize the South China Sea issue and had used the Philippines, a US ally, to advance the American strategy

I became the first South Korean person to receive the Chinese Central Government's Friendship Award in 2002 and the first from my country to get permanent residency in China in 2006