Write an English T. If you do the horizontal stroke first it's really easy to ensure the vertical stroke starts exactly on the horizontal stroke. The other way

Write an English T. If you do the horizontal stroke first it's really easy to ensure the vertical stroke starts exactly on the horizontal stroke. The other way round is harder. This matters in Chinese because there are lots of similar characters and sometimes the only difference is whether lines meet or cross. Even when there are other differences, getting it right helps the reader.