Group 1 - The article discusses the launch of a new podcast series "Knock Knock World," aimed at engaging young audiences with global events and diverse perspectives [4][11]. - The podcast will feature 60 episodes from September 1, 2025, to January 30, 2026, available for a subscription price of 179 yuan [4][12]. - The article highlights the significant interest in the podcast, with 1,164 topic submissions received in just five months since its launch [4]. Group 2 - The podcast "Knock Knock World" is a collaboration between "Sound and Vibrancy" and "One-Tenth," focusing on unlocking fresh global insights for youth [9][11]. - The first season of the podcast is set to run from March 25, 2025, to March 24, 2026, with a subscription fee of 365 yuan [9][12]. - The podcast aims to provide a platform for young listeners to explore various topics, including education, technology, and cultural differences [6][8].