Chinese President Xi Jinping on Saturday drew the "red line" for handling relations between the mainland and Hong Kong, warning against attempts to undermine national sovereignty or challenge the central government's power. Xi made the remarks at a gathering celebrating the 20th anniversary of Hong Kong's return to the motherland and the inaugural ceremony of the fifth-term government of the Hong Kong Special Administrative Region (HKSAR).<br/><br/>He said Hong Kong people enjoy more extensive democratic rights and freedom than at any other time in its history. The people of Hong Kong, now masters of their own house, run their local affairs within the purview of autonomy of the HKSAR. The President stressed the importance of having a correct understanding of the relationship between one country and two systems.<br/>