When did the Saifeng ship appear?

There are many theories about the origin of ships, such as offering sacrifices to Cao E, Qu Yuan, water god or dragon god, and its origin can be traced back to the end of primitive society. Dragon boat racing was first introduced to neighboring countries such as Japan, Vietnam and Britain. It is the official event of Guangzhou Asian Games in 20 10, and has been included in the national intangible cultural heritage list.