The name is different, it should be Ma Gu, and some places, such as Yunnan, are called Ma Xiao. The official name is Ma Gu. Horse stocks are ice tablets, which do great harm to the nerve center of the brain. Because of the role of horse stocks, the human body is overloaded and will be very tired after taking effect. If you take too many drugs, you will have hallucinations. Simply put, it is the paranoia of being killed. You think someone is following you and trying to hurt yourself. In addition, there is addiction and psychological dependence. The body will be very excited and don't have to eat anything, which will do great harm to the body. This harmony is so strong that you can only use the same pronunciation.