Introducing Myself (May, when you write a title, and this one is very good, capitalize all the important nouns, verb, adjectives, etc. It makes it look like the front page headlines of a national paper and draws more readers, reviewers, critics, etc. I'm not going to correct your text as Jaroslav already did an excellent job. What I want to comment on is spacing. Take care not to add a space between a word and the following punctuation, i.e. May , business ,  It should be May, business, etc. Also when you use any punctuation, don't forget to add one space after that punctuation. You are doing very well, just read over your text before posting it and see if your spacings. Keep writing.)

Introduce myself

Hello everyone, I am May and I am from Qingyuan. I am very happy to have this opportunity to take this test. I graduated from Guangdong University of Technology with a degree in Chemical Engineering and Technology eight years ago. The science and engineering major helped me develop develops me a a calm thinking and rational personality. In the teaching of Chinese as a foreign language, I think that it’s also necessary need to stay calm to be able to deal with different challenges. After graduating, I had my own clothes business. I have learned how to solve problems myself. After that I choose chose to be a full-time mother. I have two kids, and when I teach my children (no comma here) I learn a lot from them. For example, I need in order to keep my kids or my and students enthusiastic and interested in learning, patience and the methods used both are are both important.At last ,why I chose such a career, Finally, why did I choose such a career ? When I was a child, I grew up in a three dialects environment i.e, Cantonese, Mandarin and Hakka, and I was also interested in different languages. Last year, I met an American teacher when I was in an English class. He asked me to teach him Chinese. Then I tried to do that, but I found that it wasn't it’s not easy and that I lacked lack of teaching knowledge. So I went to school to learn how to teach Chinese because I wanted to As well as I want to become a professional Chinese teacher, and that is the reason why I am here today. The other thing I want to say is that some people may have found the career they loved when they are were 20 years old. Some people may change their minds when they are 30 years old. I think that everyone's life has its their own rhythm and point in time where they discover the career that is right for them has their own time point. I am grateful to have found the work I love, find out the direction of my loved work now and I will work hard for towards it. Thank you for your listening. (unless your text here is written for a speech it should be "Thank you for reading.")