Western critics who know little about China have claimed that supposedly it is doing nothing to help Iran, amid the US-Israeli war of aggression.

That is not true. China prefers to maintain a low profile in such conflicts, to avoid provoking the US empire, but it has been quietly supporting Iran in several key ways.

This article notes that China has served as a crucial lifeline for Iran, as Beijing has ignored the US' illegal unilateral sanctions.

China has been buying 80-90% of Iran's oil, ensuring that Tehran has consistent revenue and access to hard currency.

China has provided banking and financial services for sanctioned Iranian institutions.

According to the Wall Street Journal, China has sold "motors that have been used in Iran’s Shahed drones, chemicals for rocket fuels and electronics for an array of weapons", as well as crucial missile fuel ingredients.

China has also helped Iran's military with satellite services. This article doesn't mention it specifically, but it is almost certain that Iran is using China's version of GPS, the BeiDou system, to target the US and its proxies in West Asia.

China has likewise supported Iran diplomatically and politically. It encouraged Iran's integration into BRICS and the Shanghai Cooperation Organization. Moreover, unlike Washington, which has intentionally fostered hostility and conflict between Iran and its neighbors in the Persian Gulf, Beijing was trying to facilitate peace and rapprochment -- although Trump has now blown that up.

Obviously China is not going to directly intervene militarily; it doesn’t do that. It has a non-interventionist foreign policy, and has not fought a war since 1979.

Also think about how crazy it is to expect Beijing to intervene militarily: that would mean China would be at war with the US; that would be World War III.

China is instead working quietly behind the scenes to defend peace, sovereignty, and international law -- while the US empire is setting the world on fire.