cannot
The maximum power of the Mi 8 charger is 18W, because there is no 33w fast charge when the Mi 8 is released, so it can not be used.
However, whether it is QC4 plus charging or QC3 point 0 charger, the maximum charging power of the phone has not been stable at 18W for a long time, of which the maximum power is about 16.7W when using the QC3 point 0 charger, and the maximum power is about 15.5W when using the QC4 plus charger.
Can be, Mi 8 support fast charge, half an hour can be full.