Other than fostering the lucrative trade relations with India and China, Srivijaya also established commerce link with the Arabian Peninsula. A messenger sent by Maharaja Sri Indravarman delivered his letter for Caliph Umar ibn AbdulAziz of Ummayad in 718 and was returned to Srivijaya with Zanji (black female slave from Zanj), the Caliph's present for maharaja. The Chinese chronicle later mentioned about Che-li-t'o-lo-pa-mo (Sri Indravarman), Maharaja of Shih-li-fo-shih in 724 had sent the emperor a ts'engchi (Chinese spelling of Arabic Zanji) as a gift. Srivijaya would continue to dominate the economy of the archipelago until its decline in the 13th century.