Han and Mr. Miyagi are the connection to Daniel. The Han family and the Miyagi family are connected all the way back to the old times. And there is a mention of this within the Karate Kid movie ...

Related: The Karate Kid cast: Where are they now? "You knew Mr. Miyagi?" Daniel asks Mr. Han. "I did not come here for Sensei Miyagi," Han responds. "I came here for you." Just like a Kung Fu ...