https://changzh.me/en/updates/Recent content in Updates on Blog of BrianHugoenFri, 16 Oct 2026 00:00:00 +0800https://changzh.me/en/updates/guest-comments-and-public-chat/Fri, 16 Oct 2026 00:00:00 +0800https://changzh.me/en/updates/guest-comments-and-public-chat/<p>Guest comments and a public chat are now available without signing in. Click “Let&rsquo;s chat” in the bottom-right corner to open a compact public chat with the author and other visitors. The small button below each article expands its comment section. Choose or change your nickname before sending, reply to messages, and browse the history with automatic updates. Chinese and English versions share the same conversations.</p> <p><a href="https://changzh.me/en/#public-chat">Open the public chat</a> · <a href="https://changzh.me/en/posts/">Browse posts</a></p>https://changzh.me/en/updates/math-section-2-5-brief-solutions/Fri, 02 Oct 2026 12:55:57 +0800https://changzh.me/en/updates/math-section-2-5-brief-solutions/<p>The Math section now includes the original Section 2.5 worksheet, “Relative Positions of Lines and Conics,” and brief solutions covering examples, class practice, and homework. Answers can be revealed individually.</p> <p><a href="https://changzh.me/math/2026-1002/section-2-5.pdf">View original PDF</a> · <a href="https://changzh.me/math/en/brief-2026-1002-section-2-5.html">View brief solutions</a></p>https://changzh.me/en/updates/chemistry-homework-solutions-1-8/Thu, 01 Oct 2026 16:22:23 +0800https://changzh.me/en/updates/chemistry-homework-solutions-1-8/<p>Detailed solutions in Chinese are now available for Grade 11 Effective Homework 1–8 in the Chemistry section. Each PDF is linked beside its matching assignment; the original papers and existing brief solutions remain available.</p> <p><a href="https://changzh.me/en/chemistry/">View chemistry homework and solutions</a></p>