China’s space program took a major stride this past week as two of its satellites seemingly docked together in what could have been the country’s first high-altitude attempt at refueling a satellite while in orbit.

The Shijian-21 and Shijian-25 satellites appeared to dock with one another last week more than 20,000 miles above the planet in geosynchronous orbit, in which a satellite’s orbital period matches the pace of the Earth’s rotation, according to news outlet Ars Technica.

In April, Space Force Gen. Chance Saltzman described China’s explosive advances in space as “mind-boggling” and warned the U.S. is on a path to losing its dominance in orbit.

A photo illustration of a satellite is pictured here. (iStock)

Testifying before the bipartisan U.S.-China Commission, Saltzman said China is “heavily investing” in both ground-based and space-based weapons designed to disable enemy satellites, including kinetic strikes, radio-frequency jamming and directed energy weapons.

China also increased its military spending by 7% this year, stockpiling anti-satellite missiles and claiming to possess directed energy weapons that use concentrated energy beams to jam satellite signals.

The U.S. Space Force and NASA did not immediately respond to Fox News Digital’s request for comment.