RX4E lands after its maiden flight in Shenyang, capital of northeast China's Liaoning Province, Oct. 28, 2019. The maiden flight of China's first self-developed four-seater electric aircraft, the RX4E, succeeded Monday in the northeastern Chinese city of Shenyang. (Xinhua/Yang Qing)

RX4E flies in the sky in Shenyang, capital of northeast China's Liaoning Province, Oct. 28, 2019. The maiden flight of China's first self-developed four-seater electric aircraft, the RX4E, succeeded Monday in the northeastern Chinese city of Shenyang. (Xinhua/Yang Qing)

A technician prepares before RX4E's maiden flight in Shenyang, capital of northeast China's Liaoning Province, Oct. 28, 2019. The maiden flight of China's first self-developed four-seater electric aircraft, the RX4E, succeeded Monday in the northeastern Chinese city of Shenyang. (Xinhua/Yang Qing)

RX4E slides on the runway before its maiden flight in Shenyang, capital of northeast China's Liaoning Province, Oct. 28, 2019. The maiden flight of China's first self-developed four-seater electric aircraft, the RX4E, succeeded Monday in the northeastern Chinese city of Shenyang. (Xinhua/Yang Qing)

Guests take a look at the cabin of the RX4E after its maiden flight in Shenyang, capital of northeast China's Liaoning Province, Oct. 28, 2019. The maiden flight of China's first self-developed four-seater electric aircraft, the RX4E, succeeded Monday in the northeastern Chinese city of Shenyang. (Xinhua/Yang Qing)

Technicians prepare before RX4E's maiden flight in Shenyang, capital of northeast China's Liaoning Province, Oct. 28, 2019. The maiden flight of China's first self-developed four-seater electric aircraft, the RX4E, succeeded Monday in the northeastern Chinese city of Shenyang. (Xinhua/Yang Qing)