Why don't we see any incidents related to Chinese spies in Korea?

‌I remember there was some news a while back about someone running a restaurant or something like that..
Actually, I feel like Korea should be in the top three countries with the most Chinese spies, but strangely, nothing comes up..
I feel like when a conservative administration is backed into a corner, one thing they could do is expose something related to North Korean or Chinese spies.
The NIS and the higher-ups must know a lot, so it's strange why nothing ever breaks lol