I believe the article is wrong. It uses Foxconn as an example despite the fact that Foxconn is a Taiwanese company that suffers all the conditions that the author mentions: Chinese spying, Chinese sanctions against Taiwan and vice versa, etc. for years. China and Taiwan are even still technically at war. However, Foxconn has been in China since 1988 and is very big in China.

In my mind the real killer has been increasing costs, China's manufacturing decline has been showing signs since 2016, and is more related to increased labour costs and increased pollution regulations. The trade war is just another final nail in the coffin. The "China conundrum" or manufacturing moving out of China has been happening for a while, its just people haven't paid much attention to it until now. The decline would have happened even without the trade war.