Sharing is indeed one of the most effective ways to learn. Recently, I experienced a situation where my small blogging website, Program Manager Old Cat's Blog, was attacked by someone who snooped on my CDN traffic. Initially, I received a message about overdue payment, but I didn't take it seriously at first. Although the cost wasn't much, it still served as a lesson. My blog has indeed gone through many years since its initial setup. With the naive assumption that it would always be free, I didn't foresee such an issue. In my blogs, I have outlined many iOS and Android programming tutorials and have shared them with many developers around the world. This incident serves as a reminder of the importance of regularly monitoring and managing my online presence to avoid potential risks and financial losses. Through this experience, I have learned a valuable lesson that cannot be overstated: sharing knowledge and skills with others is crucial for growth and development in one's own field.