Core Insights - Chinese scientists have discovered a rare millisecond pulsar using the FAST telescope, which orbits another star and is obscured for one-sixth of the time by its companion star [1][3] - This unique binary star system is extremely rare and difficult to observe, contributing significantly to the understanding of stellar evolution and gravitational wave sources in binary systems [1][5] Group 1: Discovery Details - The discovered pulsar has a rotation period of 10.55 milliseconds and orbits a companion star with a period of 3.6 hours [1][3] - The companion star is at least one solar mass and is identified as a burning helium star, not a typical star [3][5] Group 2: Significance of the Discovery - The rarity of such systems is highlighted, with only a few dozen similar systems identified in the Milky Way, which contains over a hundred billion stars [5] - The discovery aids in understanding the specific processes of binary star evolution, stellar evolution theories, and the physics of compact star accretion, potentially leading to breakthroughs in astronomical research [7]