Negotiations between Su Xiao and Doflamingo could collapse at any moment, but judging by the current situation, it's clear they have reached an agreement.
Su Xiao provided Doflamingo with a list containing the original manufacturing materials for Alchemy Bombs and Apollo. Of course, these materials don't exist in the Pirate World, but he had helped the World Government create explosives, so he knew which materials could be substituted. All these materials could be found in the Pirate World.
Doflamingo immediately arranged for people to procure these materials, but he did it cleverly through underground channels. Being a leader of the Underground World, Doflamingo had a wide purchasing network.
Initially, Doflamingo wanted Su Xiao to manufacture bombs at the underground port, but Su Xiao refused, citing the damp environment, and set the manufacturing location on the fourth floor of the villa, the top floor.
