I'm pretty sure Huawei is saving the 5nm chip for launch later this year with the Mate 70. Launching a 5nm chipset phone so close to the 7nm Mate 60 makes no marketing sense. Huawei can get away with overclocking the 7nm CPU for the P70. BUT consumers will demand much much more features for the Mate 70 launch, like for example a 5nm chip.