China has responded to the joint US-Israeli attacks on Iran with strong diplomatic condemnation. In an article published on March 1, China’s state-run Xinhua news agency called the attacks a “flagrant violation” of the purposes and principles of the UN charter. The same article called the intervention a departure from “fundamental norms of international relations”.

This reaction resembled China’s response to the US capture of the former Venezuelan leader, Nicolás Maduro, in early January. At that time, Chinese officials condemned what they described as a violation of international law. The Chinese foreign minister, Wang Yi, warned that no country should act as a “world policeman” or “claim itself to be an international judge”.

Beyond diplomatic condemnation, China’s most significant contribution to the conflict in Iran so far has come through its satellite navigation system, BeiDou. In recent years, BeiDou has emerged as a possible alternative to the dominant Global Positioning System (GPS), which is owned and controlled by the US government.

During the 12-day war between Iran and Israel in 2025, widespread GPS jamming caused significant disruption to Iranian civilian and military systems. Deactivating GPS and switching to BeiDou has thus given Iran’s military more strategic depth. It has done so by, for example,........

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