The J-20 stealth fighter has been officially deployed to the country’s Eastern Theatre Command, suggesting it will be focused on the Taiwan Strait and countering military activities by the United States in the region, observers said. Collin Koh, a research fellow at NTU Singapore said, “The unit turning operational in the Eastern Theatre Command is precisely aimed at Taiwan. And to challenge US military activities in the Taiwan Strait, besides posing a threat to the median line that Taiwan’s air force patrols along.”