Analysts note that all Chinese J-series fighters, including export versions, use HMSD helmet-mounted displays (HMDs). However, when the J-35's HMD is compared with the advanced HMDS Gen III system used on the F‑35—costing around $400,000—a number of differences emerge. The F‑35’s HMDS Gen III is considered a key fifth‑generation technology, fully replacing traditional HUDs and significantly enhancing pilot situational awareness. By contrast, the J‑35’s helmet system is less sophisticated, and China’s design retains a conventional HUD as a backup in case the HMD fails, reflecting the high cost and complexity of producing a full‑capability system like the HMDS Gen III. Other nations often opt for cheaper, more reliable solutions for similar reasons.