Tech companies that supply US parts are moving from China to Taiwan to avoid spy tech being inserted from Chinese plants and to avoid US tariffs. Notes computer/server power supplies can even be used to covertly transmit data.

"If the server is compromised and the chip implanted in the power supply system is activated, the power lines could serve as a covert channel to transmit data," Philippe Lin, senior threat researcher at cybersecurity company Trend Micro, told Nikkei.

Lite-On's American customers had been alarmed by reports from Bloomberg Businessweek last year alleging that Beijing implanted tiny chips into the data center supply chains of U.S. tech companies, the executive with the Taiwanese manufacturer said.

Beijing denied the spying allegations. Tech companies like Amazon.com and Apple also challenged the report.

https://asia.nikkei.com/Business/Companies/Spy-fears-spread-to-power-cords-driving-shift-from-China