The reason why Gaitao gave the jewels to Mei Shuang may be out of trust and respect for her, but also in order to realize his own plan. Specifically, it may be because he wants to keep these jewels safe from Mei Shuang and return them to him when necessary. In addition, he may also hope that through this behavior, Xiang Mei and Shuang will trust him and win her support and trust.