By Sherry Hsiao, Shih Hsiao-kuang and William Hetherington / Staff reporters, with staff writerThe Chinese Nationalist Party (KMT) needs to be changed “from the root,” former Taipei mayor Hau Lung-bin (郝龍斌) and former Taipei County commissioner Chou Hsi-wei (周錫瑋) agreed yesterday. In the past, there was only “one voice” in the KMT — that of the chairperson, but the chairperson “is not a saint,” he said. “The party chairperson also makes mistakes.”With a collective leadership that considers multiple opinions, there would be “few chances of making mistakes,” he added. In an online interview on Saturday, Hau proposed the KMT post a representative to China. Only by embracing social media could the party better connect with the public, particularly younger people, Hau said.