Zainuddin Hamidi (March 2, 1952 - July 5, 2011), also colloquially known as Zainuddin M.Z., was an Indonesian Islamic preacher, da'i, and politician. He was nicknamed as ''Dai Sejuta Umat'' (da'i for millions) due to his sheer popularity among the Indonesian society. He entered politics later in his career, first serving as an administrator of the United Development Party (PPP), and later the chairman of the Reform Star Party (PBR).
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