From wikipedia:

Since the founding of the People's Republic of China in 1949, feng shui has been officially deemed as a "feudalistic superstitious practice" and a "social evil" according to the state's atheistic Communist ideology and discouraged or even outright banned at times [39][40]. Persecution was the most severe during the Cultural Revolution, when feng shui was classified as a custom under the so-called Four Olds to be wiped out. Feng shui practitioners were beaten and abused by Red Guards and their works burned. After the death of Mao Zedong and the end of the Cultural Revolution, the official attitude became more tolerant but restrictions on feng shui practice are still in place in today's China. It is illegal in the PRC today to register feng shui consultation as a business and similarly advertising feng shui practice is banned, and there have been frequent crackdowns on feng shui practitioners on the grounds of "promoting feudalistic superstitions" such as one in Qingdao in early 2006 when the city's business and industrial administration office shut down an art gallery converted into a feng shui practice [41]. Communist officials who had consulted feng shui were sacked and expelled from the Communist Party [42].

So it does indeed seem to be banned to some extent.

In any case, I don't see anything in the comment that makes fun of the fengshui culture. It's the actions of the Chinese that is being mocked. If he is in fact Taiwanese, I'd be inclined to believe it's just a misunderstanding caused by the language barrier.