Every sunny day, there are always three white electric RX1E airplanes circling overhead at northern Shenyang's Caihu general aviation airport in Liaoning province.

The two-seater plane can fly for 45 to 60 minutes at a maximum speed of 120 kilometers an hour after an hour-and-a-half of charging. And it is China's first electric airplane which is ready for mass production.

Four aircraft are currently in service, and another 20 due to be produced this year.