Do I have to take the expressway from Yinan to Qingtuo Town?

No, according to Baidu map, Yinan can take Yixin Line to Qingtuo Town. As of July 28th, 2023, Yixin Line is the most convenient national first-class highway connecting Linyi City and Yinan City. Completed and opened to traffic in 2008, it has become one of the most prosperous roads in Yinan and Linyi.