Four South Korean activists have been detained in China since March on suspicion of spying after they interviewed North Korean refugees living in hiding. South Korea's foreign ministry confired the four were arrested in Dalian on charges of 'endangering state security.'
The four activists merely supported the devastated North Korean refugees with food and shelter. However, China charged the activists with 'endangering state security,' and treated them as criminals.
It's ironic that China is siding with North Korea that is driving its people to the extent of leaving them with no option, but to run away, while applying the charge of 'endangering state security' to those who are providing food and shelter to the poor souls.
This is the basic reason why China may become a superpower, but not an advanced country.