Chinese Spy Plane Flies Through South Korea’s ADIZ Three Times in One Day

So how come the ROK government doesn’t have their military lock a weapons control radar on to one of these Chinese aircraft that continue to fly through the ROK’s ADIZ? They were more than happy to do this against a Japanese reconnaissance aircraft earlier this week:

A Chinese military jet entered South Korea’s air defense zone without notice three times on Thursday, prompting Seoul’s Air Force to scramble fighter jets in response, defense authorities here said.
The aircraft entered the country’s air defense identification zone, called KADIZ, at around 10:21 a.m. from an area near Jeju Island and Ieo Island and exited it half an hour later, according to the Joint Chiefs of Staff (JCS). 
It again crossed into the KADIZ at around 11:54 a.m. and flew out of the zone at around 12:51 p.m., the JCS said, adding that the aircraft made an another entry at 2:14 p.m. before leaving the airspace at around 3 p.m. 
A JCS official said the aircraft is believed to be a Y-9 type reconnaissance plane.

Yonhap

You can read more at the link, but before this recent flight the Chinese violated the South Korean ADIZ 110 times and yet no aggressive action has been taken. I think we all know the answer on why the ROK military gets aggressive against Japan, but not China. Getting aggressive with Japan has little to no consequences; getting aggressive with China will likely lead to real consequences.