​Yusanggok water is  
Samjinnal It was a banquet where people floated drinks in the garden and recited poetry until they floated in front of them. 
It was enjoyed by scholars and nobles of the East.
Goksu Yusang(曲水流觴)·Goksujiyu(曲水之遊)·
It is also called Goksu-yeon (曲水宴) or Gokgang-yeon (曲江宴).