How did Tang Priest and his disciples cross the Liusha River in the Journey to the West?

I crossed the Liusha River in the gourd of Master Guanyin.

The Journey to the West was written by Wu Cheng'en, a novelist in the Ming Dynasty. According to the records of the Western Regions in Tang Dynasty, folklore and Yuan Zaju. The Song Dynasty's Poem of Sanzang's Learning from the Scriptures (whose real name is Sanzang's Learning from the Scriptures) is the earliest prototype of The Journey to the West, and the Tang Priest took Master Xuanzang as the prototype.