A striking phenomenon is emerging from China as the Middle East conflict presses on: technically skilled civilians are volunteering their expertise online to help Iran counter US military might, without seeking payment or official backing. The trend was vividly illustrated on March 14, when a detailed tutorial on taking down America’s F-35 appeared on Chinese social media and went viral. Created by the account “Laohu Talks World” and subtitled in Persian, the video meticulously explained how...