I've struggled for a long time to improve my Chinese, and my own diagnosis of the issue is that I've been focused on other things, primarily, but also that I simply wasn't sure where to find good material on which to study for my specific interests. When your language level is advanced enough, you have to really select material. You can't just learn about anything. Or rather, you will want to select material because you'll want to be engaged with the material itself. You're not just learning the language. You want to use some other form of media as a medium through which you can learn the language. For instance, watching TV. I've met lots and lots of people who say they watched all of Friends, the TV show, and that helped them improve their English dramatically. I've tried a few Chinese series and even made it through all of season one of My Fair Princess, which is a very well-known TV show from I think the early 2000s or maybe late 90s. However, the plot got a bit ridiculous for my taste in the second season, and I did not continue. Also, that show is set in the Qing Dynasty, so the language they use often isn't the most applicable to day life. LLMs provide an excellent way out or path forward here in that they will talk about anything you want, and they have access to the internet now. So you can go learn about anything you want in your target language. The fact that it's on demand is extremely important. I've been able to shoot off questions in Chinese and get back excellent long answers, also in Chinese, from the LLM. And read those in the small cracks of time that appear throughout the day, especially in the gym. Some people enjoy listening to music, but I find it somewhat distracting. So I usually don't listen to anything, but between sets, it can get a bit boring. And more importantly, it just feels like that time should be used on something. If you add up all the time between sets, it's quite a lot of time. And so far, Chinese practice seems to fill that gap really nicely. And importantly, this is reading practice. I'm not practicing speaking. I'm not practicing writing. But reading practice is also really important to gain an advanced understanding of the language. Especially with a language like Chinese, where the reading is just ridiculous from the standpoint of an English speaker with our phonetic written system. It's extremely important to get tons and tons of reps if you want to gain any reasonable speed at reading the language.