What you should ask is Tongcheng Daokou Bus Station, which is on Longteng Road, opposite the New Oriental Express Hotel.
Tongcheng generally refers to Tongcheng, a county-level city under the jurisdiction of Anhui Province, which is managed by Anqing City, with a total area of 1.472 square kilometers. Tongcheng has jurisdiction over 3 streets and 12 towns with a total population of 745,000.