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Volunteers attend a flag-conferring ceremony during an activity held to mark the International Day against Drug Abuse and Illicit Trafficking in Sanhe, north China's Hebei Province, June 26, 2019. (Xinhua/Lu Peng)

Volunteers attend a flag-conferring ceremony during an activity held to mark the International Day against Drug Abuse and Illicit Trafficking in Sanhe, north China's Hebei Province, June 26, 2019. (Xinhua/Lu Peng)