Wu totalled 394.400 points in the five-round semifinals on Saturday, giving her a lead of 32.30 points over second-place Tania Cagnotto of Italy, who had 362.100 points. The four-time Olympian is still seeking her first medal.
Wu is chasing her record-tying sixth Olympic medal. She already owns three gold medals in three-meter synchro, as well as one silver and one bronze.
Wu's synchro partner, He Zi, was third at 354.500. Cassidy Krug and Christina Loukas of the U.S. also advanced to Sunday's final.
Canada's Jennifer Abel and Emilie Heymans also advanced to the final.
Abel, from Laval, Que., scored 353.25 to finish fourth, while Heymans, from St-Lambert, Que., followed in eighth with 331.35.