Chiang Kai-shek died in April 1975 at the age of 87, and was succeeded to the presidency by Yen Chia-kan while his son Chiang Ching-kuo succeeded to the leadership of the Kuomintang (opting to take the title "Chairman" rather than the elder Chiang's title of "Director-General"). Formerly the head of the feared secret police, Chiang Ching-kuo recognized gaining foreign support to securing the ROC's future security required reform. His administration saw a gradual loosening of political controls, a transition towards democracy, and moves toward Taiwanization of the regime. Opponents of the Nationalists were no longer forbidden to hold meetings or publish papers. Though opposition political parties were still illegal, when the Democratic Progressive Party was established as the first opposition party in 1986, President Chiang decided against dissolving the group or persecuting its leaders. Its candidates officially ran in elections as independents in the Tangwai movement. In the following year, Chiang ended martial law and allowed family visits to mainland China.