The Siak Sultanate took advantage of the trade supervision through the Straits of Melaka, as well as the ability to control pirates in the region. The progress of Siak's economy can be seen from the Dutch records which stated that in 1783 there were around 171 merchant ships making a voyage from Siak to Malacca. Siak is a trading triangle between the Netherlands in Malacca and the United Kingdom on Penang. But on the other hand, the glory of Siak gave jealousy to the descendants of "Yang Dipertuan Muda", especially after the loss of their power in the Riau Islands region. The attitude of dislike and hostility towards the Sultan of Siak, seen in the Tuhfat al-Nafis, where in the description of the story they describe the Sultan of Siak as "a person who is greedy for the wealth of the world".