Liu Yuanyuan, soprano singer of the Central Nationalities Song and Dance Troupe and a national first-class actor, commented on the public welfare activity "Three Rivers, Beijing Love, Chinese Heart - Yushu Tibetan Youth Beijing Tour" "Gathering Love, Transmitting Warmth - Seminar on Public Welfare Activities for Youth in Ethnic Minority Areas" was held in Beijing on June 6th. The seminar aimed to share the experience of the public Welfare activities of "Sanjiangyuan" and put forward opinions and suggestions on how to better promote public welfare.