All sources are people "with knowledge of" . No sources were connected to the companies involved or named. Other publishers that actually contacted the companies involved show the premise in this document to be absolutely false. The companies involved in this article stated that they had no plans to leave or reduce operations in China.

The Asian Review is sort of the English translation of the Nikkei business site. Given the usual non-coverage of Asian matters in western media, its articles are okay-ish as long as one remembers it is a) a pro-business site and b) pro-Japan leaning. Rising wages in China and Thailand has seen a move to more business friendly (i.e. cheaper wages, fewer regulations, pro-western) countries over the last five years. Anyone who travels extensive in SE Asia has seen the rise of Chinese corporations moving to lower waged places (not very socialist of them) so a lot of the mentioned moves by corporations have nothing to do with the current trade disputes as they've been in the planning stage for some time.

There are a lot of un-named people who supposedly represent big companies cited in this article. Maybe some of the information/ideas in here come from the AmCam China/Shanghai poll of large companies:https://www.amcham-shanghai.org/sites/default/files/2019-05/Joint_survey_on_tariffs_May_2019.pdf There does seem to be a lot of ideas being thrown around as to what these tech giants with production in China will do as sown in this CNN article saying that those same companies are trying to get exemptions: https://www.cnn.com/2019/06/20/tech/tech-companies-against-tariff/index.html

While there are a couple of quotes from named sources far down the article, there is far too much that relies on unnamed sources. That said, there may be a bit of meat on the bones here, it's evident the author did reach out to several companies--at least based on the number of "did not comment"'s in the text of the article.

The article relies on ambiguous sources as evidence that the stated companies might be moving their production out of China. The sources are mentioned as "multiple sources told the Nikkei Asian Review" and "according to people familiar with the matter." This kind of vague sourcing reads more like gossip than reporting.