When top Chinese officials held receptions for dozens of American and European business executives at back-to-back annual economic forums last week, the intended message was clear: China is open for business.But by week’s end, China’s fearsome regulators had sent an altogether different signal.Beijing announced a cybersecurity review of Micron Technology, a top-tier U.S. chip maker, on Friday. The measure, which many industry analysts had expected, is China’s most significant stroke of retaliation against Washington over its campaign to sever China’s access to high-end chips.China’s internet watchdog said it was conducting a review of Micron’s products sold in the country to “safeguard the security of the information infrastructure supply chain.” Mao Ning, a Chinese Foreign Ministry spokeswoman, characterized the review as a “normal regulatory measure” focused on products that could affect national securi …
