Core Points - The event showcased over 180 science popularization exhibits and activities, attracting significant public interest [1][3] - Interactive projects included a water rocket powered by water and compressed air, and a wooden satellite model that rotates using solar energy [3] - The National Botanical Garden serves as a science museum, featuring rare botanical specimens and opportunities for visitors to engage in hands-on activities [3] Summary by Categories - **Exhibits and Activities** - The event featured a variety of science exhibits, including a bionic fish and a ping-pong cannon utilizing Bernoulli's principle [1] - The "air cannon" attracted many young visitors, demonstrating the principles of air pressure and motion [1] - **Interactive Science Projects** - A water rocket launched to over ten meters high, showcasing the principles of propulsion using water and compressed air [3] - A wooden satellite model powered by solar panels demonstrated renewable energy applications [3] - **Educational Value** - The National Botanical Garden is highlighted as a significant educational resource, housing some of the earliest introduced species in Beijing and unique geological specimens [3] - The event aimed to create a festive atmosphere around science, with various institutions under the Chinese Academy of Sciences participating in diverse educational activities [3]