If you don't know how to introduce yourself in chinese people will not be able to know who you are and what is your relationship to them. In the same way if you can't introduce yourself then unless the people you meet in china know english, they will also not be able to introduce themselves to you. Or even if they did, you would not understand.
In this video lesson Demi teaches you the fundamentals - how to introduce yourself in Chinese. Learn how say "What's your name", "My name is..." and also learn how to ask general questions.