Mo Lan.
The letter that had been wandering for more than four months was finally handed to its owner.
This letter followed the caravan to many places. Originally, the caravan that Jian Qingqing had found was heading straight for Mo Lan. However, when this caravan passed by the Yi Kingdom, they encountered a city that was flooded. They were first trapped there. Then, the goods they were going to bring became popular, so they stopped there for a long time.
After that, the caravan had been going back and forth between several cities in the Yi Kingdom to reverse the goods. When they had earned enough, they remembered that they still had a letter in their hands, so they began to set off again.