 On 30 January 1406, the Yongle Emperor expressed horror when the Ryukyuans castrated some of their own children to become eunuchs to give them to the emperor.The Yongle Emperor said that the boys who were castrated were innocent and did not deserve castration, and he returned the boys to Ryukyu and instructed them not to send eunuchs again.An anti pig slaughter edict led to speculation that the Zhengde Emperor adopted Islam due to his use of Muslim eunuchs who commissioned the production of porcelain with Persian and Arabic inscriptions in white and blue color.