Under Prime Ministers Tun Abdul Razak and Tun Hussein Onn, Malaysia shifted its policy towards non-alignment and neutrality. Malaysia's foreign policy is officially based on the principle of neutrality and maintaining peaceful relations with all countries, regardless of their ideology or political system, and to further develop relations with other countries in the region. In 1971, ASEAN issued its neutralist and anti-nuclear "Zone of Peace, Freedom and Neutrality" (ZOPFAN) Declaration. In the same year, Malaysia joined the Non-Aligned Movement. Consistent with this policy Malaysia established diplomatic relations with the People's Republic of China in 1974.