Zijin Grass
At the 1985 World Horticultural Exposition in Tsukuba, Japan, Yamaguchi's son donated 1 million seeds and told his father's story to visitors from worldwide. Since then, the flower has been dubbed as "the flower of peace". Its moral is: "Remember history; cherish peace".Inspired by the story, Haozheng Pei created several purple flower models and placed them near a bronze statue in the Memorial Hall in the 2000s. These models were noticed by the Memorial Hall and thus became one of its official collections as well as cultural and creative designs.