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When Li returns to the Panda Village with Po, Sum and his brother rush to greet their uncle. Li then introduced the two to their cousin who they are excited to meet as Po is since he has more family he didn't know about.
Fighting style and abilities
Is Sum's twin brother. The two are often seen together, such as swinging in hammocks together and ricocheting themselves into the sky by using the hammocks as sling shots. All of this shows, they have a close relationship.
Is Sum's uncle through his unknown father or mother,[source?] there is not much interaction save for him introducing them to Po after they return to the Panda Village. Li seems to love them, as he was quite happy to show them he reunited with his son
Po is Dim's cousin through his uncle Li. They were introduced to each other after Po arrived to the Panda Village (Kung Fu Panda 3). Po was very excited after learning he had cousins as that meant he had more relatives besides his father.
- Sum and his brother Dim are named after the popular Cantonese dish style dim sum, a serving of food containing small bite-sized portions served traditionally in small steamer baskets or on small plates. The dim sum style of dining is used with many various dishes, but is most popularly prepared with steamed buns, dumplings, and rice noodle rolls.