The great smoke we read on TV or in books refers to

Opium. Great smoky refers to opium, which is named after the drug made from the opium poppy capsule. Because of its black or brown color, strong smell, ammonia smell or old urine smell, it gives off a sweet smell when smoked, so it is also called great smoke. Opium is a major drug. After cooking and fermentation, it can be made into refined opium, which is brown or golden yellow and sweet when smoked. Raw opium is boiled and fermented to become cooked opium for human consumption, and made into strips or cakes. Opium used to be used as medicine, but now it is still used as medicine, such as opium powder, tablets, compound platycodon grandiflorum powder, stone-removing powder and Koga tablets. It should be noted that opium is a very harmful drug, and smoking opium will lead to health problems and life risks, so what we see on TV or in books refers to opium.