From Yandanshan to Wuyuan then to Sanqingshan...

From Yandangshan, you need to go back to Wenzhou city first. From Wenzhou Shuangyu Bus Station, you can find one direct bus to Wuyuan at 10:10.
From Wuyuan, you need to take the bus to reach Yushan Bus Station. From Yushan Yuanpan Bus Station, there are direct buses to reach Sanqingshan.
To Nanchang, it is suggested go to Yushan Railway Station take the trains to back to Nanchang.