I like the HKPF, ptu, raptors , etc uniforms though, hope they can keep those
Oh I believe they will keep the uniforms, ranks, the hierarchy, and even the structure of the PF. It's 1C2S after all.
The integration and changes (in the HKPF) are going to be deep under the skin, like in technologies and equipments as their western supplies dry up. Feedback from the HKPF might even help the mainland manufacturers of police equipments find new markets in other former British colonies. The ongoing intelligence sharing across the border will be certainly strengthened. I hope there will be permission granted at some level for each other's certain databases, if this hasn't happened already.
I, too, think they have the best PF uniforms in China. As the mainland PFs getting better funded, I hope they can learn from HK in this area.