You can take the subway and bus from Dongfu subway station in Haicang District of Xiamen to Xiamen Zhongshan Hospital. The specific steps are as follows:

1. Start from Dongfu subway station and walk 10 meters to reach Dongfu station.

2. Take Metro Line 2 and arrive at Hubin Middle Road Station via 10 station.

3. Get off at Hubin Middle Road Station and walk 230m to Shi Ting Road Station.

4. Take bus No.26 and arrive at Jiaheyuan Station after 6 stops.

5. Finally, walk 1 10 meters to Xiamen Zhongshan Hospital.

According to the above steps, you can take Metro Line 2 and Bus No.26 from Dongfu Subway Station in Haicang District of Xiamen to Xiamen Zhongshan Hospital, which is estimated to take about 45 minutes.