Does anyone know what "968" is about?

This means that there are many authentic surnames of Liu and Zhang, such as nine descendants of Liu, and among these "Nine Lius", there is the famous "Tea Lius".

Liu Lei was born in the late Xia Dynasty. He studied dragon training with the master of dragon breeding technology, and domesticated four dragons for Kong Jia, the thirteenth emperor of Xia Dynasty, so he was named dragon lion by Kong Jia. Liu Lei lived in the south of Yanshi County, Henan Province, when he was a Kongjia dragon.

Later, due to poor reproduction, a female dragon died. Liu Lei was afraid that Kong Jia would be punished, so she secretly fled to Lu Xian County (now Lushan County, Henan Province) with her family. Liu Lei's descendants took Liu Lei's name as their surname, which was the earliest surname of Liu in China.

Origin and evolution:

According to historical records such as Han Shu, Tongzhi Genealogy and Chinese Surnames, there are three main sources of Liu's surname: Qi surname, Ji surname and the change of foreign surnames.

The earliest branch originated from the surname Qi, and was a descendant of Emperor Yao. Formed in the late summer, from Lushan, Henan.

Liu, whose surname is Qi, has two homologous branches: one comes directly from Liu Lei and was formed in Xia Dynasty; In the early Spring and Autumn Period, a scholar society composed of descendants of Liu Lei was formed.