Plant Kingdom: Globally, it is the Amazon Plain. Amazon Plain: The world's largest plain, the region has a tropical rainforest climate with high temperatures and high rainfall all year round. It has the world's largest tropical rainforest area (known as the lungs of the earth) and is known as the world's animal and plant kingdom. In China, it refers to Yunnan Province. Hometown of Medicinal Materials (China): The hometown of ginseng is Fusong County, Jilin Province; the hometown of Panax notoginseng is Wenshan Zhuang and Miao Autonomous Prefecture, Yunnan Province; the hometown of Coptis chinensis is Shizhu County, Sichuan Province; the hometown of Codonopsis pilosula is Changzhi County, Shanxi Province; the hometown of Angelica sinensis is Min County, Gansu Province; the hometown of licorice is Hangjin Banner, Inner Mongolia Autonomous Region; the hometown of wolfberry is Zhongning County, Ningxia Hui Autonomous Region; the hometown of silver flower is Pingyi County, Shandong Province; the hometown of Poria cocos is Luotian County, Hubei Province; the hometown of Tremella fuciformis is Tongjiang County, Sichuan Province; the hometown of Zhejiang Fritillaria is Yin County, Zhejiang Province; the hometown of Corydalis yanhusuo is Dongyang City, Zhejiang Province; the hometown of Hangzhou chrysanthemum is Tongxiang City, Zhejiang Province; the hometown of Ophiopogon japonicus is Cixi City, Zhejiang Province; the hometown of Atractylodes macrocephala is Pan'an County, Jiangxi Province; the hometown of yam - Pingyao County, Shanxi Province; the hometown of Citrus aurantium - Jing'an County, Jiangxi Province; the hometown of papaya - Xuancheng City, Anhui Province; the hometown of Alisma orientalis - Jian'ou City, Fujian Province; the hometown of pearl - Hepu County, Guangxi Zhuang Autonomous Region; the hometown of hawthorn - Linzhou City, Henan Province; the hometown of astragalus - Wuchuan County, Inner Mongolia Autonomous Region; the hometown of Fritillaria - Songpan County, Sichuan Province; the hometown of Polygonum multiflorum - Deqing County, Guangdong Province; the hometown of Momordica grosvenori - Yongfu County, Guangxi Zhuang Autonomous Region; the hometown of mint - Nantong City, Jiangsu Province; the hometown of centipede - Daishan County, Zhejiang Province; the hometown of Cornus officinalis - Chun'an County, Zhejiang Province; the hometown of donkey-hide gelatin - Dong'e County, Shandong Province.