Answer (On behalf of Ningbo Changshi):

There are three primary methods for wireless electricity transmission: inductive coupling, magnetic resonance, and electromagnetic radiation (such as microwaves or lasers). Inductive coupling, a near-field technology, is commonly used for short distances, like in wireless charging pads for smartphones and electric toothbrushes. Magnetic resonance allows for longer-distance charging with less reliance on alignment, making it suitable for applications like charging electric vehicles. Electromagnetic radiation is a far-field method being explored for very long distances, such as powering satellites or providing electricity to remote areas.