Liu Jiangyong holds a poem by a Ryukyuan student in front of a rubbing of the Ryukyu tombstone in Beijing's Tongzhou district. Photo: Xu Liuliu/Global Times

Liu Jiangyong holds a poem by a Ryukyuan student in front of a rubbing of the Ryukyu tombstone in Beijing’s Tongzhou district. Photo: Xu Liuliu/Global Times