How many times can I participate in the Hunan University Student Public Service Advertising Competition? Hello, you can't participate in other competitions. You can't take part in other competitions at the same time. Is not allowed. Public service advertising contest. With the theme of "Striving for a New Journey and Building a New Era", the contest collected outstanding public service advertising works full of the flavor of the times with strong ideological, artistic and ornamental features, carrying forward the main theme and spreading positive energy. I'm happy to answer your question. I hope I can help you.