There are two ways of doing this.
You can tell it all in the first person, by using the person's actual words (or an approximation thereof) and enclosing them in quotation marks (or inverted commas, as I have heard them called in BrE.) If you wanted to use this method, you would have written "Once I took ... one of the students" as an actual quotation of Huang Chun-ming's speech. The need to distinguish the quoted words of the student from those of the teacher would be met by enclosing the student's words in single quotes or single inverted commas, e.g. 'What the f*ck are you doing'.
The other method, which may be easier for you, is to tell it all in the third person, as what we call reported speech. Huang Chun-ming said that this happened, and then that happened and so on.