Core Viewpoint - China has successfully established the world's first lunar-earth space constellation based on the DRO (Distant Retrograde Orbit), marking the beginning of a new era in lunar exploration [1] Group 1: DRO Advantages - The DRO orbit offers three unique advantages: low-energy entry, stable parking, and full accessibility, allowing spacecraft to carry more scientific payloads and remain stable for decades [2] - DRO serves as a natural hub for connecting Earth, the Moon, and deep space, potentially becoming a new domain for space science exploration and infrastructure deployment [2] Group 2: Development Timeline - The Chinese Academy of Sciences initiated the "DRO Exploration Research" project in February 2022, with the first experimental satellite DRO-L successfully entering a sun-synchronous orbit in February 2024 [3] - The DRO-A/B dual satellite system was launched in March 2024, overcoming challenges to reach the intended orbit after a rescue operation covering nearly 8.5 million kilometers [3] Group 3: Technological Breakthroughs - The successful establishment of inter-satellite communication links between the three satellites has led to significant advancements, including low-energy entry into DRO and the first verification of satellite tracking and navigation capabilities in lunar-earth space [4] - Future research will focus on the complex dynamics of three-body orbits in lunar-earth space and the deployment of high-precision atomic clocks to support fundamental scientific research [4]