In terms of transportation, you can take high-speed trains and planes. From the airport to downtown. You can take the airport bus or taxi. In the urban area, you can go to various scenic spots by bus or taxi. The recommended scenic spots are Tianchi Lake in Changbai Mountain, Longjing Scenic Area and Songhua River Scenic Area in North Korea.
I suggest you try Yanbian's dog meat hot pot, peasant stir-fried meat and tortillas, all of which are delicious and distinctive Yanbian cuisine.
When you visit Yanji, you can choose to participate in some special activities. When staying in Yanji, you can choose some distinctive hotels and homestays. In Yanji, you can also experience some cultural activities.