I am reporting back that after some burning, the Fiio LC-RD Pro cable works great on Z1R in term of sound quality, at least I have the impression that it is at least on par, if not better than the stock cable. Of course, I did not do any serious A/B test, just hours of long term listening.
However, Fiio LC-RD Pro fails to address the most import Con of stock cable, which is the horrible fitting. At first the slightly angled MMCX gives me the hope, but unfortunately, the hook of the cable still jump over my ears instead of stay behind my ears.
Good news to me is, I am using a headband with Z1R anyway. Even with more expensive and specially designed for Z1R MMCX cable from Plussound cable, I doubt I can wear the Z1R in my jogging.