Which one is better, the southern line or the northern line of Dali?

Both lines are good.

The southern route of Dali’s basic tourist route goes in the direction of Weishan, and can mainly go to the three counties of Weishan, Nanjian and Midu. Weishan in Dali is very famous, Weibaoshan is a famous Taoist mountain in Weishan, Nanjian is a Yi Autonomous County, the Torch Festival is very lively, and the winter cherry blossoms in Wuliang Mountain are even more beautiful.

The northern route of Dali’s basic tourist route should be considered the most popular tourist route, because starting from the ancient city you can see the three towers of Dali’s landmark Chongsheng Temple. In "Five Golden Flowers" there is the romantic Butterfly Spring, the picturesque Eryuan West Lake and hot springs, and then Jianchuan. Jianchuan is a newly popular tourist town in Dali. From Jianchuan Ancient City, Shaxi Ancient Town to Shibaoshan, it is a perfect integration of natural scenery, humanities and history.