One of my life mottoes is: never conclude something is a conspiracy when human stupidity is more likely. China allows wild animal "wet" markets, and peasants buy bats and other wild creatures. The poor folk eating them, along with the hunters that capture them, allow for the transmission of viruses that are benign to the animal to humans and the combination can produce a SARS or Covid-19 epidemic. This article give ample details.
So I don't think we have to conclude there was a conscious effort by the Chinese to infect the world. Human stupidity -- authoritarian government in this case -- is an ample explanation. Read the article and remember, the smart thing to do would be to shut down the wild animal markets so people would be discouraged from eating bats, among other dreadful menu items from the wild. But don't count on the Chinese leadership to do it.
From Bats to Human Lungs, the Evolution of a Coronavirus | The New Yorker