The UN Security Council held a debate over global security and stability, chaired by China, which holds the rotating presidency for August. UN Chief Antonio Guterres said the global collective security system is facing unprecedented challenges. China's Permanent Representative to the UN Zhang Jun said respecting sovereignty and territorial integrity is the golden rule for exchanges between countries. Professor Teng Jianqun, a researcher at the China Institute of International Studies, said that new mentality and cooperation are needed to address common challenges.