The advertisement refers to the goods sold or provided directly or indirectly by a commodity operator or service provider for commercial purposes through a certain medium or form, such as newspapers, television, street signs, shop windows, etc. Public outreach by the service. Which of the following belongs to advertising campaigns? ['The director of the cement factory gave a gift of one million yuan to the contractor in the neighboring county in order to better sell the cement.', 'Bush Jr. gave a speech on television and in the press in order to be president.', 'Li Ning brand clothing sponsors Chinese sports delegation to go to the Olympics to obtain good social and economic benefits.', 'The teacher stipulates that students must use ballpoint pens for exams.']