Core Insights - Xu Jun, a 46-year-old barber, has gained popularity as an astronomy blogger with over 700,000 followers by creating three homemade telescopes over five years, showcasing a unique cross-disciplinary passion for astronomy [1][28] - His journey began with a gift of a telescope from his wife in 2017, which sparked his interest in astronomy [3][5] - Xu's first successful telescope was completed in April 2021 after four months of meticulous work, allowing him to view the moon, which motivated him to pursue larger and more complex telescopes [11][13] Group 1: Journey and Challenges - Xu's initial inspiration came from a report about a hobbyist who built a telescope, leading him to attempt the same despite lacking prior experience [7][9] - The first telescope's success encouraged him to tackle larger projects, specifically a 20-inch telescope, which posed significant challenges in terms of weight and precision [14][15] - He faced numerous obstacles, including environmental factors and the complexity of the construction process, which tested his patience and determination [21][23] Group 2: Achievements and Recognition - After a year of effort, Xu completed a 40-pound primary mirror for his second telescope in June 2022, which he then assembled into a fully functional telescope [23][25] - His work has garnered attention from both the public and professionals, including recognition from a university researcher who noted the impressive size and quality of his telescopes [33] - Xu continues to innovate, currently working on a third telescope with enhanced features, including a high-precision tracking system for deep space photography [35]