A method of plating a substrate including coating a substrate surface, laser-treating a region of the coated surface, and plating the region. The messages include FlowEnqueue. A master household appliance provided by the present invention comprises: a main Bluetooth module configured to receive and send information; and a main control module configured to communicate with at least one slave household appliance via the main Bluetooth module so as to control a working state of the slave household appliance. A potential charge is allowed to build up in a capacitor bank, the capacitor bank is then disconnected from the energy input source and then pulse charged at high voltage into the battery to receive the charge.