China, Pakistan, and Iran formed a trilateral nuclear and missile cooperation pact

Evidence

China also licensed production in Iran of Chinese surface-to-surface missiles. North Korea supplemented this assistance by shipping Scuds to Iran, aiding Iran to develop its own production facilities, and then agreeing in 1993 to supply Iran with its 600-mile-range Nodong I missile. On the third leg of the triangle, Iran and Pakistan also developed extensive cooperation in the nuclear area, with Pakistan training Iranian scientists, and Pakistan, Iran, and China agreeing in November 1992 to work together on nuclear projects. The extensive Chinese help to Pakistan and Iran in developing weapons of mass destruction evidences an extraordinary level of commitment and cooperation between these countries. — Samuel P. Huntington, The Clash of Civilizations and the…, 504