Hai Ruo[1] lived on an island in the sea, and every year on the eighth month a raft floated past on the currents. This continued for years without fail. Someone provisioned a raft and set off, arriving at a place where they saw a person watering cattle in a river. There was also a weaving woman,[2] and when they asked her what place it was, her cattle-watering father spoke: “You should go back and ask Yan Junping of Shu;[3] he ought to know.” The person returned and called on Junping. Junping said: “On such-and-such a day, month and year, a comet crossed into the Big Dipper and Altair. Having calculated the dates, it must have been you.” The person then realized that, floating with the current, their raft had reached the Heavenly Crossing.
Li Rong 李冗, Du yi zhi, 獨異志 (Outstanding Fantastic Stories), 上1.1 (Tale 2):
乘槎至天津
海若居海島，每至八月即有流槎過。如是，累年不失期。其人齎糧槎而往，及至一處，見有人飲牛於河，又見織女，問其處，飲牛之父曰：「可歸問蜀嚴君平，當知之。」其人歸，詣君平。君平曰：「某年月日，有客星犯斗牛，計時，即汝也。」其人乃知隨流槎至天津。
Li Rong 李冗, Du yi zhi, 獨異志 (Outstanding Fantastic Stories) in Du yi zhi, Xuanshi Zhi 獨異志，宣室志 (Outstanding Fantastic Stories, Stories from the Chamber of Dissemination), edited by Zhang Yongqin 张永钦 and Hou Zhiming 侯志明 (Beijing: Zhonghua shuju, 1983)
[1] Hai Ruo 海若 is a spirit of the sea. See https://baike.baidu.com/item/%E6%B5%B7%E8%8B%A5/9723235.
[2] This ‘weaving woman’ signifies Vega, brightest star in the Lyra constellation.
[3] Yan Junping 嚴君平 (86 BCE -10CE) was a famous Daoist scholar from Sichuan. See https://baike.baidu.com/item/%E4%B8%A5%E5%90%9B%E5%B9%B3.
Zhiguai Translations 