Yinhe-1 - meaning Galaxy-1 - is the first in a series of 5G communication satellites that will eventually form a global Chinese telecommunications constellation.

Each satellite is reported to have a mass of 277 kg.

The planned 144 satellite constellation will operate at an orbital altitude of 1,150 km.

The Kuaizhou 1A (KZ-1A) is a Chinese commercial small-lift orbital launch vehicle, developed by the China Aerospace Science and Industry Corporation (CASIC). It is part of the Kuaizhou family of rockets, originally designed as quick-response military payload carriers. The Kuaizhou 1A was created to offer a more commercially viable version, targeting the growing small satellite launch market. It is a solid-fueled rocket with a high degree of reliability and rapid launch capability, which allows it to deploy payloads into low Earth orbit (LEO) within a short preparation time.

Specs

Height: 19.4 meters (63.6 feet)

Diameter: 1.4 meters (4.6 feet)

Liftoff Mass: 30 metric tons

Payload to Low Earth Orbit (LEO): 300 kg (661 lbs) to 200-300 km altitude

Payload to Sun-Synchronous Orbit (SSO): 200 kg (440 lbs) to 700 km altitude

Stages: 3 solid-fuel stages + 1 liquid-fuel upper stage

The KZ-1A stands out due to its compact size and relatively low cost, making it appealing to customers needing to launch small satellites, including those for Earth observation, communication, and technology demonstration purposes. It is capable of carrying payloads up to about 200 kg to a 700 km Sun-synchronous orbit (SSO). The Kuaizhou 1A's operational flexibility and ability to be launched from mobile platforms add to its appeal for both governmental and commercial clients, making it a key player in China’s expanding commercial space sector.

The rocket made its maiden flight on January 9, 2017, and has seen several successful launches since then, showcasing its effectiveness in placing small satellites into orbit.