Behind the Annual Production of 120 J-20s: The Truth About China's Fighter Jet Production Capacity from Three Overlooked Data Points

In early February, a report on air power assessment released by the Mitchell Institute caught my attention with a particular figure: the annual production of the J-20 by China's Chengdu Aircraft Industry Group has reached approximately 120 units. This number may not seem impressive at first glance, but when viewed in the context of global stealth fighter production, its significance changes entirely.

The First Data Point: What 120 Units Means

Many people compare this figure with the annual production of the U.S. F-35 (Lockheed Martin delivered 156 F-35s in 2025) and conclude that "China's production capacity is still inferior to that of the U.S." This comparison misses the key point.

The F-35 is an international program, with production lines supplying the U.S. military and several allied nations, with capacity spread across three assembly lines in the U.S., Italy, and Japan. In contrast, the J-20 is produced for a single customer (the People's Liberation Army Air Force) at a single production base (Chengdu Factory 132). A factory achieving a capacity of 120 units per year indicates that China's aviation industry has already broken through the technological bottleneck of mass production for fifth-generation fighter jets.

According to publicly available bidding information and annual reports from listed military enterprises, Chengdu Factory 132 has completed three production line upgrades between 2022 and 2024, adding automated assembly equipment and composite material forming workshops. These investments are not for "showing capability," but rather to continuously improve production capacity. Interestingly, the annual report of Aviation Industry Corporation of China (AVIC) in 2024 mentioned that "the capacity ramp-up of a certain key model is proceeding smoothly"—industry insiders generally believe this refers to the J-20.

The Second Data Point: The Feasibility of 1,000 Units by 2030

If the production rate of 120 units per year is maintained, approximately 480 additional units could be produced from 2026 to 2030 over four years. Combined with the existing 300-350 units (based on public reports and satellite imagery estimates), reaching around 800 units by 2030 is highly probable. To reach 1,000 units, production capacity would need to be further increased to 150-160 units per year.

Is this increase possible? I believe it is, but not with the existing production lines. AVIC has backup aircraft assembly facilities in Anshun, Guizhou, and Shenyang. If a second J-20 production line is activated, a capacity of 150 units per year is entirely achievable. However, there is a key question: can the production capacity of the WS-15 engine keep up?

According to public information, the WS-15 is produced by Shenyang Liming Aircraft Engine Company. In 2023, Liming was criticized for "delays in a certain key engine project," although it was not explicitly stated that it was the WS-15. However, the timeline and priority align. Even if the WS-15 has now entered mass production (with a J-20 featuring vector thrust nozzles publicly displayed at the 2024 Zhuhai Airshow), the ramp-up from small batch production to an annual output of 200-300 engines (each J-20 requires two engines) will take at least 2-3 years.

In simple terms, whether the J-20 can reach 1,000 units by 2030 does not depend on how many airframes Chengdu can produce, but rather on how many engines Shenyang can deliver.

The Third Data Point: A Strategic Shift from "Hiding" to "Showing"

The Mitchell Institute's report also mentioned a detail that is easily overlooked: from 2021 to 2022, the PLA's aerial activities around Taiwan saw the J-20 almost completely absent—out of 972 entries into Taiwan's air defense identification zone, none were confirmed to be J-20s. However, starting in 2024, the J-20 began to frequently appear in exercises in the Eastern Theater Command and even publicly showcased its flight performance at the Singapore Airshow.

The logic behind this shift is clear: when you only have 50 stealth fighters, the best strategy is to "hide," maintaining an air of mystery so that opponents cannot gauge your capabilities and tactics. But when you have 300, or potentially 1,000 in the future, "hiding" becomes meaningless—you need to let your adversaries know "I have many," creating strategic deterrence.

From this perspective, the high production capacity of the J-20 is not just a technical issue, but also a change in strategic posture. The Chinese Air Force is transitioning from "secret deployment of a small number of elite stealth fighters" to a new phase of "normalizing the use of large-scale stealth fighters."

A Question Without an Answer

What truly deserves attention is not whether 1,000 J-20s can be produced by 2030, but rather: how does China plan to use these 1,000 J-20s?

The U.S. F-35s are globally deployed, spread across multiple bases in Japan, South Korea, Guam, Australia, forming a forward deterrence network. If China has 1,000 J-20s, will they be concentrated in the Eastern Theater Command to address the Taiwan Strait and South China Sea, or will they be dispersed to the Western and Southern Theater Commands? If the latter, it would mean that the Chinese Air Force's strategic vision has expanded from "regional defense" to "global projection"—but this requires supporting aerial refueling aircraft, early warning aircraft, and overseas base support.

These questions may not be answered until 2028-2029. However, one thing is certain: the industrial capacity to produce 120 stealth fighters annually has already made China the second-largest producer of fifth-generation fighter jets in the world, after the United States. This production capacity gap is much smaller than many people imagine.