Studykaki

The Concept Forest now has over 18 million trees. Some are saplings (a student’s first week of calculus). Some are ancient redwoods (a retired professor who has answered 12,000 questions on organic chemistry). The forest is viewable in a public 3D gallery, and every April 15th, the community holds a "Silent Walk"—24 hours where no new questions are asked, only old answers are revisited and refined.

But Lin Wei saw a problem. The platform was becoming… noisy. studykaki

That was the seed. Lin Wei was not a coder by training—he was a mechanical engineering major—but he knew enough Python to scrape data and build a basic web interface. He called his creation StudyKaki (a play on study buddy and the Indonesian word kaki , meaning "foot," as in "on foot"—a journey taken together). The Concept Forest now has over 18 million trees

He shared the link in three small Facebook groups: "Taipei Engineering Students," "Self-Study Physics," and "Late Night Coders." For two weeks, nothing happened. Then, one Tuesday morning, he woke up to 14 notifications. A student in Kaohsiung had answered his fluid mechanics question—not with a text reply, but by uploading a step-by-step diagram, annotated in red, with arrows showing the flow separation point. The forest is viewable in a public 3D