Have Xiao Yi and Issa met?

No, according to the introduction of the film "Three-Line Wheels Tour", we know that the two sisters in the film are called Xiao Yi and Issa respectively. The film begins with the tragedy of the Lancang River changing families in the "Three Surnames of Water and Water", and tells the story of meeting a stupid rich second generation, accidentally acquiring the ability of water and water, living in Hangzhou, and then exploring.