Public service advertising in China has a history of more than 20 years. However, for a long time, public service advertising in China has been largely dominated by the government. Its independence and autonomy cannot be fully reflected. Most of the media produced and released public service because of administrative orders Advertising, the poor awareness of actively taking on social responsibility, the direct result is insufficient public service advertising vitality and failed to form a wide range of social influence. In addition, driven by economic interests, the media will use public service advertising as a means of image formation, resulting in Public service ads are disconnected from the general public. Wha does this text mainly introduce? ['Development History of Public Service Advertising in China.', 'Deficiencies and Limitations of Public Service Advertising in China.', 'Characteristics of public service advertising in China.', 'The development direction of public service advertising in China.']