The surge in anti-Americanism extends beyond speeches. Over the summer, for example, the Chinese government began a security review of foreign nongovernmental agencies operating in China, as well as Chinese nongovernmental agencies that receive foreign support, scrutinizing their finances and freezing bank accounts. A 100-minute anti-American propaganda film made by the People’s Liberation Army last year laid out the case that American nongovernmental agencies were out to undermine the party. (It used the martial theme music from the HBO series “Game of Thrones.”)

In Guangdong, the province adjacent to Hong Kong that has long been more open to foreign influence and investment, officials have considered shutting down Chinese nongovernmental agencies that depend on foreign funds, the state-run newspaper Global Times reported last week.

Wang Jiangsong, a professor of labor relations at the China Institute of Industrial Relations, was quoted in the newspaper as saying that the authorities had secretly tracked transfers of overseas money to the Chinese organizations and were worried that “some NGOs would be manipulated by overseas forces and conduct activities that may endanger national security and undermine social stability.”

The campaign has reached into academia as well. An employee of an American organization that promotes dialogue among scholars said some Chinese professors who work on international relations were no longer writing or saying anything in public that cast the United States in a positive light, for fear of being accused of spying. The employee, who spoke on the condition of anonymity so as not to antagonize Chinese partners, added that one Chinese university had barred visiting American scholars from lecturing if their research did not conform to the party line.

Casting blame on the “black hand” of foreign forces has become more common in the state news media as well. The People’s Daily has published 42 articles this year blaming “Western,” “foreign” or “overseas” forces for China’s domestic problems. That total is nearly triple the number of similar pieces from the first 10 months of last year, according to a count by The Christian Science Monitor.

The pro-democracy demonstrations in Hong Kong have been a favorite target. Last Friday, Ta Kung Pao, a Hong Kong newspaper close to the party, ran a front-page article under a headline that said the newspaper had found “ironclad evidence” that the United States had been secretly plotting the local Occupy movement since 2006.