I want to take my mother from Beijing to visit Yanji, Changbai Mountain and Harbin. How to arrange the route more easily when I am not tired?

According to your plan, the more reasonable arrangements are as follows: First, from Beijing to Changbai Mountain, the route Beijing-Tonghua-Baihe-Changbai Mountain is the best scenic spot to see Changbai Mountain. Not only can you see Changbai Mountain Waterfall, but you can also get close contact with Tianchi Water, the groundwater 100 million years ago; Because I just started traveling, I have plenty of energy and physical strength, and the place I went to was a nature reserve. The natural landscape is very different from the metropolis, and the tourism effect is the best. After seeing Changbai Mountain, go directly to Yanji, without going far. Feel the customs and delicacies of Korea; After that, I went directly from Yanji to Harbin and went to Sun Island for summer sightseeing. After the game, there is an express train from Harbin to Beijing. The advantage is that I didn't take the repeated route, which maximized the travel time and broadened my travel horizons. The scenery along the way is panoramic. Have a nice trip!