Tan shen is a Chinese medicinal herb known for its various health benefits. It is commonly used in traditional medicine to treat anxiety, insomnia, and other stress-related symptoms. However, there are several other synonyms that can be used for this herb, including radix notoginseng, san qi, Tian Qi, and Panax notoginseng. All these synonyms refer to the same herb with similar medicinal properties. Radix notoginseng is commonly used for healing wounds and improving blood circulation while san qi is known for its anti-inflammatory effects. Tian Qi is used to enhance physical endurance and strengthen the immune system. Overall, these synonyms reflect the versatility and effectiveness of this powerful herb.