In my experience playing Arknights Endfield, stumbling upon secret elements like hidden doors truly adds an exciting layer of exploration to the game. The secret door described here, which Mi Fu discovers via a well-hidden mechanism, is a perfect example of how the game rewards curiosity and attention to detail. When you find this secret door, it doesn't just open a new area aesthetically—it provides a strategic advantage by leading directly to the fort, an important location in the game. I remember feeling a mix of surprise and accomplishment the first time I triggered such a hidden passage because it felt like uncovering a well-kept secret among the game’s vast environment. For players interested in uncovering all the hidden paths and secrets, paying close attention to NPC dialogues—like Mi Fu's hints—and thoroughly exploring walls and lesser-trodden paths is key. Sometimes what looks like an ordinary wall can conceal a mechanism or door. The fact that not many people know about this particular secret makes discovering it even more rewarding. Additionally, understanding the role of characters like Autom and Chen Qianyu can provide further story context and clues during exploration. It’s these subtle narrative touches that enrich the experience beyond just gameplay mechanics. If you’re aiming to fully immerse yourself in Arknights Endfield’s world, take the time to experiment with different interactions and don’t hesitate to revisit previously explored areas when new items or abilities become available. Revisiting locations with fresh eyes can often reveal hidden secrets like this door, which initially seemed like just a blank wall.