The author learned Mandarin Chinese to a conversational level in 12 months, spending around 1500 hours, which is significantly less than the estimated 4000 hours required to achieve intermediate fluency. The author used a combination of classroom hours, tutoring, and self-study methods, including Anki and watching Chinese media. They also traveled to China and immersed themselves in the language, which greatly accelerated their learning. The author notes that their approach was not focused on passing tests, but rather on achieving practical fluency.