Who gave you the water of forgetting?

Name source: Forgotten Year Water, also known as "Forgotten Year Water", is a little-known magical medicine in the world, compiled by the ancient books of Guo's ancestors 300 years ago. More than 200 years ago, although countless patients were cured, none of them were rewarded. Under the world situation of "healing the scar and forgetting the pain, drinking water and forgetting to dig a well", Guo's ancestors left an admonition that "this medicine is called' Forgetting Water', which is for domestic use only and should not be spread abroad". After the changes of the times, people after Guo have not practiced medicine for 100 years, and they have not prepared this medicine, and they are on the verge of extinction several times. Fortunately, in 2006, by chance, Guo's descendants had to dig up the ancient prescription because of their own injuries (in the case of fruitless medical treatment everywhere), and based on this, they prepared this medicine, which was quickly and completely cured (magical and incredible). When used on others, not only the curative effect reaches 100%, but also 100% for "I can't forget you".