Lanshan district, Linyi City. According to Baidu map, there is an erhu shop in lanshan district, Linyi City, named Suzhou Erhu. So Linyi erhu bowstring is sold in lanshan district, Linyi City. Linyi City, formerly known as Langya and Yizhou, is a prefecture-level city under the jurisdiction of Shandong Province, a second-class big city, and a central city in southeastern Shandong approved by the State Council.