People at both sides think they are legit.
An average HKer: I don't trust China's Justice system, which is heavily influenced by their government. I could be sent to China for made-up crime.
An average Chinese: Its a shame that HK as a part of China has Extradition treaties with all other countries but not Macau/Taiwan/Mainland (historical law by british). Imagine the same case for Hawaii and US Mainland.