[Detaching Riing blades from the hub (IMPORTANT)]

Hello guys! im new here. just a quick question. i hve recently bought and received my riing fans from thermaltake! i have taken them apart to paint. (white) but i cant find any way to actually take the blades apart from the hub. no screws or little clips to take off. ive pushed the blades. seeing if it was like the corsair fans. where you just push the blades and it pops off the hub. but it hasnt. i didnt want to push too hard incase i broke it. but i did push it fairly hard. but to no avail. can anyone help me out please? thanks. i may as well show my build (WIP) no way near finished. but this is it in its current state.