Diplomatic overtures also were made during Jigme Dorji Wangchuck's reign. Although always seeking to be formally neutral and nonaligned in relations with China and India, Bhutan also sought more direct links internationally than had occurred previously under the foreign-policy guidance of India. Consequently, in 1962 Bhutan joined the Colombo Plan for Cooperative, Economic, and Social Development in Asia and the Pacific known as the Colombo Plan, and in 1966 notified India of its desire to become a member of the United Nations (UN). In 1971, after holding observer status for three years, Bhutan was admitted to the UN. In an effort to maintain Bhutan as a stable buffer state, India continued to provide substantial amounts of development aid.