OK, I made it work !

I soldered 2 cables parallel to the crystal and connected them to the cable from Reflex XTR which was originally made for the E-sky Transmitter.

Can somebody explain me why that works ? I mean the E-sky and the Walkera both using the Zhen Hua Protokoll, other Transmitters like Graupner, Robbe, Futaba, etc. don't. But the cable to the Reflex Interface is only that, a cable, for all kind of Transmitters.
So I think the Reflex Interface can decode Zhen hua