What are you doing up? Please tell me what it means. In what circumstances can I use it?

Time to Change My Way of English Learning I have been studying English for sixteen years since I entered junior high school. It was not easy to learn it when I first started with my English teacher. At that time, the Internet was not so available and there was so few extra materials of English except for our textbooks. I love my teacher but I have to say truthfully that he had a poor pronunciation and he taught English just as the math formulas. I was confused and gradually lost my interest on it. Then I went to high school. My English teacher Ms.Zhu was a very good person but she had no choice but to teach us to learn just for the sake of the examination. After that, I entered my university where I met my college English teacher Ms.Jiang. She was kind to me and inspired me to speak not just read with my head down. She introduced VOA radio to us and let us take part in the role-play games in class. She entirely opened a new window for me to see the new world of English. Though I have learned English so long time, I still find it's difficult to understand what people are talking in the English movies, especially when they speak too fast and too much slang is involved. I ever watched an English training program taught by a Chinese-American man.He has a perfect American accent and he also speaks Chinese very well. I found his lessons useful. He said people mostly didn't speak as the standard pronunciation book tells. While in our tradition, we get used to learning by entirely accepting what the teachers teach. Our teachers seldom expect us to discuss freely. So we have few chances to practice our oral English. However, we spent most time in reading and writing. After graduation from university, I found the reality that people who speak English well get more opportunities in careers. So I decide to change. I want to change my way of learning. I will spend more time practicing spoken English and talk to people more frequently. And I wonder to meet you, my dear friends. If you also want to improve spoken English, just come to me.