Why

An hour later, the merchant ship passed through the two mountain passages and arrived at the waters of the Principality of Jinge.
Another hour.
An island appeared ahead.
Your Highness, the merchant ship's fuel is about to run out, and there is fuel to be replenished on this island. The boatman came to Salimu Lim and said.
Yes! It's okay. You can arrange it.
Salimu Lim nodded gently.
Good! The boatman chuckled.
Then, the merchant ship headed towards the island ahead, trembled...