Taiwan vs. China (he said / she said?)

Taiwan talks about the (no longer secret) Chinese hackers conducting espionage seemingly all over the world and then China outs a Taiwanese hacker?

https://www.first.org/newsroom/globalsecurity/168300.html

Since this activity has apparently been going on for years but only in the last year has it really come to the publics attention - one has to wonder, are the Chinese hackers getting sloppier or are the detection methods getting better? :)
As a former IR guy - I want to believe people are getting better at spotting the intrusions. :)