It is generally observed through methods such as smell and color to determine if Tianqi powder has become moldy, and it should not be used anymore once mold appears.

Tianqi powder is a commonly used traditional Chinese medicine in clinical practice, which has the effects of promoting blood circulation and removing blood stasis, as well as reducing swelling and alleviating pain. It is mainly used in clinical treatment for physical discomfort symptoms caused by diseases such as cardiovascular and cerebrovascular diseases. Under the guidance of a doctor, using the medicine can alleviate the condition and prevent the disease from worsening.

However, Tianqi powder also has a certain shelf life. If Tianqi powder has an abnormal smell or a moldy smell, the color turns black and green, indicating that Tianqi powder has become moldy and should not be used anymore.