Agreed. The OnePlus phone's wireless fast charge and Xiaomi's can be used together. Because the general millet wireless charger is compatible with other devices, it can be used. In general, the phone power is maintained between 65% and 75% is the best, but this is only the ideal state, of course, can be appropriate to expand this range, as far as possible to the phone store power control between 40% and 70%.
The fast charger can be shared, and there is no problem with two mobile phones