Charging my device from power bank with two-way USB-C cable? So I have Nexus 6p with USB-C port and a Xiaomi Pro 10000 power bank.

Charging my device with bundled USB A -&gt; microUSB -&gt; USB-C Cable works. But when I connect them with my two-way USB-C cable that was bundled with my phone my phone is charging the power bank. Is it possible to charge my phone instead?
Xiaomi Mi Pro does not support discharge through the USB-C port. It's not possible. I've tried everything.

If any store promises this feature this might just be a translation error (source)

Quickcharge through the usb-c port on nexus 6p is not possible too.