One Experience of China Undergraduate Mathematical Contest in Modeling(part 1) Attending the China Undergraduate Mathematical Contest in Modeling (UMCM) maybe one of the most unforgettable experiences of my college life. Not only have I won the second prizes of China which is the greatest achievement I have ever made in a project, but also learned plenty of knowledge and skills as well as the team spirit. I have heard about the UMCM when I was a high school student. Besides its high authority and wide recognition around the world, what attracted me most was to apply my knowledge to solve practical problems, equaling with the learning destination of students like us majoring in engineering. I attended the UMCM when I was a sophomore, a little shy and introverted girl who doesn’t like communicating with strangers. Therefore, I was very excited but a little nervous when I passed the entry test and entitled to attend the train for the UMCM, because students there were most from math or computing department which I wasn’t familiar at all. However, the teachers and students are all nice, which created a comfortable and pleasant atmosphere for our study. Different teachers introduced us different professional knowledge used in mathematical modelling, such as data analysis, supply chain, artificial intelligence algorithm etc.. But they told us that they just guided us to the gate of these knowledge, if we wanted to learn more about these and then grasped these, we needed to spend much time and energy to learn it by ourselves. Since the UMCM was a team competition, so I grouped a team with a boy from math department and a girl from computing department. All of us had great grade ranks in our major, so we were confident to achieve a good grade of the UMCM. But not everything goes smoothly as expected. Though we worked very hard and seriously, we got the second prize of school modelling competition ranking sixth instead of the first prize of the top five. We didn’t lose our hearts and decided to do better in the UMCM. We gave up our summer vocations and kept practicing solving problems of the past years. It was a common situation that we didn’t agree with each other and we would keep discussing or inquiring teachers until we got the same idea.