This is the third cutscene that happens along the "historical" or "bad" route in Legend of Jiāng Wéi, following the final battle. This showcases the 'end' of the Guān clan at the hands of Páng Huì.
蜀記曰:龐德子會,隨鍾、鄧伐蜀,蜀破,盡滅關氏家。
Shǔjì records: Páng Dé’s son Huì served Zhōng [Huì] and Dèng [Ài] on campaign [against] Shǔ. When Shǔ was destroyed, [Páng Huì] exterminated the Guān family.