The MD-500 (A20) is a transport helicopter that can be used to transport up to 4 passengers and 1 pilot. It has a wide range of cargo and passenger carrying capabilities. The helicopter has a high fuel capacity, and it can fly for a long time. The helicopter is designed to be durable and capable of withstanding high levels of crash and impact damage.

The A20 is an updated version of the MD-500, which was previously known as the ZH-1. The ZH-1 was first introduced in 2012, and it was replaced by the A20 in 2016. The A20 is designed to be more comfortable than the ZH-1, and it has a wider range of cargo and passenger carrying capabilities.