That wasn't the only information that Rui got from the Beggar's Sect. A separate document that he had received from Sian was related to the available missions in the Saiful Region to get him started.
Although the contract that he signed with the Beggar's Sect gave him remarkable latitude in regard to the schedule at which he wanted to fulfill his commission payment, he understood that it was best to reinforce their agreement by beginning immediately. It was a way of demonstrating that he was fully serious about their transaction and that they needed to get started on fulfilling their agreement of the deal.
Furthermore, he hadn't forgotten that the most important thing to him at the moment was gaining some experience as a Martial Senior. That priority trumped all others at the moment, thus fulfilling some missions was also in his general interests.
