Core Insights - Zhihu is celebrating its 15th anniversary on January 26, 2026, with a series of community activities, including the revival of its first question, "How to use Zhihu correctly," and a collection of user experiences and stories [1][3] Group 1: Community Engagement - The revival of the first question has led to a surge of user participation, sharing their experiences and insights over the past 15 years, illustrating the diverse ways users engage with the platform [3] - Users like Zhang Xiaobei and Sun Yueli highlight the platform's role in fostering meaningful knowledge sharing and personal growth, emphasizing that there is no single correct way to use Zhihu [3][5] Group 2: User Contributions - Various users from different fields, such as MathHub and Thoughts Memo, describe their journeys on Zhihu, showcasing how the platform has influenced their professional development and creative output [5][7] - The platform has evolved from a simple Q&A tool to a space for deep learning and personal reflection, as noted by users like Wu He Zhi Ye [10] Group 3: Future Outlook - Despite the challenges posed by the AI wave, users continue to seek truth and authenticity on Zhihu, with some likening the platform to the "tenth man" from the film "World War Z," emphasizing its role in verifying information [7][9] - The anniversary activities include interactive initiatives like "Experience Beach" and a creative collection titled "A Small Thing Between Me and Zhihu," aimed at building a collective memory of the community [10]