You can take a long-distance bus from Chenzhou to Zhongshan Hua Fu Bus Terminal. By train, you need to get off at Guangzhou Railway Station, turn right to the provincial bus station, and then transfer to the bus of Zhongshan Hua Fu Hotel. Take the high-speed train at Guangzhou South Railway Station, you can directly transfer to Guangzhou-Zhuhai Railway and get off at Zhongshan North Railway Station. After arriving in Zhongshan, you can take a taxi directly to the eye hospital. The urban area of Zhongshan is very small.