By Yew Lun Tian and Eduardo Baptista BEIJING (Reuters) – China’s Communist Party on Saturday approved amendments to its constitution aimed at cementing the core status of Xi Jinping and the guiding role of his political thought within the party as it wrapped up its twice-a-decade congress. The party was also set on Saturday to elect its Central Committee, which on Sunday will choose the elite Politburo Standing Committee, with Xi, 69, widely expected to secure a third leadership term. A third five-year leadership term would solidify Xi’s place as China’s most powerful ruler since Mao Zedong, f…