In the third act, the narrative converges in China where Prince Deng Tsin Qin attempts to cement his rule with Caesar's legions backing him. Asterix, Obelix, Princess Fu Yi, Tat Han, and Graindemaïs rally loyalist forces to storm the imperial palace.
Asterix resolves his self-doubt by combining sharp wits with the magic potion when Roman forces threaten to overwhelm them, while Obelix overpowers enemy battalions and rescues Tat Han. Prince Deng Tsin Qin is defeated, and the Empress is restored to her throne. Caesar retreats to Rome in humiliation to endure Cleopatra's continued disdain. The Gauls return to Armorica to celebrate with their traditional moonlit banquet of roast boar, keeping bard Cacofonix safely bound and gagged.