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Cheng Xiaohe, an associate professor at the School of International Studies of Renmin University of China, noted that Pyongyang has been stepping up its diplomacy with its neighboring countries since the breakdown of the Hanoi summit－a move he sees as an effort to secure support in its nuclear negotiations with the United States.

Chen explained the current situation "seriously undermines the rule of law, undermines social order, and violates the rights and freedoms of the majority".

Chen sexually harassed his former doctoral student Luo Qianqian 12 years ago, and since that story made the news in early January, five other students have come forward.

Chen Qiaoshan, a medical analyst at Beijing-based market research consultancy Analysys, said by offering a higher threshold of registration, the Chinese government has strengthened supervision and control of exported medical drugs and equipment.

Chen Xiaodong, assistant foreign minister, told reporters that the two presidents exchanged viewpoints on the PLA's Djibouti Logistics Support Base, which was officially established in July.