Colonel Dai Xu of the People’s Liberation Army wrote online that the new strain of bird flu hitting China, known as H7N9, is an American “bio-psychological weapon” meant to destabilize China. The rant, posted to Dai’s account on the Twitter-like service Weibo, had already been shared by more than 30,000 fellow users by the time that the South China Morning Post reported it on Monday. Dai now has a quarter million followers on Weibo, which is quite a platform.

In general, Chinese Web users appear to have rejected Dai’s argument. In response to the criticism, though, he’s only dug in. “It is common knowledge that a group of people in China have been injected with mental toxin by the U.S.,” he wrote at one point. “I will not retreat even half a step.” He urged Chinese officials to ignore the virus’s apparent spread and argued that the disastrous 2003 SARS outbreak was also an American plot.

Dai’s conspiracy theory does not appear to be widely held, although fears about the United States and its supposed secret desire to topple the Chinese Communist Party are not uncommon among Chinese officials. He is a lecturer at the National Defence University, giving him a not insignificant platform for his theories and the worldview behind them.