I think the oppo r9plus supports wireless charging.
OPPO R9's VOOC flash charging technology uses low-voltage fast charging to ensure that the low temperature of the phone is relatively low when charging, and the safety is relatively high. And when charging the mobile phone operation can also be flash charging, other fast charging methods will automatically switch to the ordinary charging mode when playing the machine.
Wireless charging technology The device uses the received energy to charge the battery and at the same time for its own operation. Since the energy is transmitted between the charger and the electrical device by a magnetic field, no wires are connected between the two, so the charger and the electrical device can be exposed without conducting contacts.