Most warplanes of the 1950s are museum pieces or scrap. The Xian H-6 is neither. Nearly seventy years after its Soviet ancestor first flew, China is still building, flying, and continually re-arming this jet — and the latest versions are among the most strategically important aircraft the People’s Liberation Army owns.

The secret to its longevity is simple: the H-6 stopped being a bomber in the old sense. It became a truck for missiles — and missiles kept getting better.

A Soviet bomber with a Chinese passport

In 1957 the Soviet Union licensed China to build the Tupolev Tu-16 Badger, a twin-jet medium bomber then only a few years old. The first fully Chinese-built example flew on 24 December 1968 from the Xian plant, and in that guise — the H-6 — it became the backbone of Chinese strategic aviation. In 1965 an H-6 air-dropped a device during one of China’s early nuclear tests over the Lop Nor range.

For decades it was exactly what it looked like: an ageing Cold War bomber. Then China did something clever.

From bomber to missile truck

The clean break came with the H-6K, first flown in 2007. Out went the old glazed navigator’s nose, replaced by a solid radar dome; in came a glass cockpit, more efficient turbofan engines for greater range, and six underwing pylons for long-range cruise missiles. The H-6K no longer had to fly over a target — it could launch stand-off weapons from hundreds of kilometres away.

The H-6N, in service since 2019, went further still, adding an aerial-refuelling probe and a fuselage recess sized for a large air-launched ballistic missile — a weapon associated with China’s emerging air-based nuclear deterrent.

Why an old jet still matters

That last upgrade carried outsized significance.

The Pentagon now warns that a force of roughly 120 H-6K and H-6N bombers could saturate the Pacific with long-range and hypersonic anti-ship missiles — the ‘carrier-killer’ threat that shapes so much U.S. naval planning. China is developing a genuine stealth bomber, the H-20, to eventually succeed it. But until that arrives, a 1950s design keeps getting new missions, new engines, and new missiles. The airframe is old. The threat is not.

Sources: U.S. Department of Defense (China Military Power Report); China Aerospace Studies Institute; The National Interest; The Aviationist.