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At one point, the field had more than 20 candidates, with contenders dropping out as their chances faded.

At East Chapel Hill High School in North Carolina, students were holding a session discussing gun violence in addition to joining students around the country in a walkout.

Asked about their China strategy, Holz-Schietinger said: "If we want to get rid of animal agriculture, we need to be global, and China is front and center for that goal."

At Monday's signing ceremony, Iran's Petroleum Minister Bijan Namdar Zanganeh, Total's CEO Patrick Pouyanne and Lv Gongxun, representatives of the CNPC were present.

At a time when economic globalization is facing twists and turns and the multilateral trade system is shaken, SCO member countries, as beneficiaries of global trade liberalization, should continue to firmly support trade liberalization and a rulebased multilateral trade system, Li said.