The 30th wedding anniversary is a pearl wedding in China, the United States and France, and an ivory wedding in the United Kingdom. Although the name of the 30th anniversary of marriage is different in different countries, but the metaphor used to compare the 30 years of marriage is similar, pearls and ivory are precious things grown after a long time of honing and grinding, both have soft, moist, beautiful glory. It is after 30 years of ups and downs, the relationship between husband and wife will be as precious as pearls and ivory, with charming luster.