Formerly Mandarin Poster.
We started in 2010. A couple of Brits learning Chinese in Taiwan, who wanted a study aid that would be as useful to a beginner as to someone years in. So we built a poster of the most common characters, ordered by frequency, and called ourselves Mandarin Poster. It found its way to learners in more than 60 countries.
When the pandemic made shipping posters around the world impractical, we redrew everything for self-printing. It turned out to be the better idea: nothing to ship, nothing to wait for, and you can print another sheet whenever you fill one up. The practice paper is free and always will be. The packs are how we keep the lights on.