What is the most cost-effective way to travel from Harbin to Yunnan?

You can go by yourself. Of course, you'd better have some friends with you. Because the traffic in Yunnan is not bad, don't worry about not going to the scenic spots in the past. It is very convenient to book a plane ticket to Lijiang and then consider going to the surrounding scenic spots. Compared with the newspaper group, it is more free to spend within its own budget.