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 plant and animal kingdom. Domestically, it refers to Yunnan Province. Hometown of Medicinal Materials (China): Hometown of Ginseng—Fusong County, Jilin Province; Hometown of Panax Notoginseng—Wenshan Zhuang and Miao Autonomous Prefecture, Yunnan Province; Hometown of Coptis chinensis—Shizhu County, Sichuan Province; Hometown of Codonopsis pilosula—Changzhi County, Shanxi Province; Hometown of Angelica sinensis—Min County, Gansu Province; Hometown of Licorice—Hangjin Banner, Inner Mongolia Autonomous Region; Hometown of Lycium barbarum—Zhongning County, Ningxia Hui Autonomous Region; Hometown of Silver Flower—Pingyi County, Shandong Province; Hometown of Poria cocos—Luotian County, Hubei Province; Hometown of Tremella fuciformis—Tongjiang County, Sichuan Province; Hometown of Fritillaria thunbergii—Yin County, Zhejiang Province; Hometown of Corydalis yanhusuo—Dongyang City, Zhejiang Province; Hometown of Hangchrysanthemum—Tongxiang City, Zhejiang Province; Hometown of Ophiopogon japonicus—Cixi City, Zhejiang Province; Hometown of Atractylodes macrocephala—Pan'an County, Zhejiang Province; Hometown of Chinese Yam—Pingyao County, Shanxi Province; Hometown of Citrus aurantium—Jing'an County, Jiangxi Province; Home of papaya—Xuancheng, Anhui Province; Home of oriental water plantain—Jianou, Fujian Province; Home of pearl—Hepu County, Guangxi Zhuang Autonomous Region; Home of hawthorn—Linzhou, Henan Province; Home of astragalus—Wuchuan County, Inner Mongolia Autonomous Region; Home of Fritillaria—Songpan County, Sichuan Province; Home of Polygonum multiflorum—Deqing County, Guangdong Province; Home of Momordica grosvenori—Yongfu County, Guangxi Zhuang Autonomous Region; Home of mint—Nantong City, Jiangsu Province; Home of centipede—Daishan County, Zhejiang Province; Home of cornus—Chun'an County, Zhejiang Province; Home of donkey hide gelatin—Dong'e County, Shandong Province.