Ming Tombs by bus

From the subway station, you can take the subway line 2 to Gulou Street. Take the Exit A1 and walk westwards for 230 yards, you will reach the Gulou Qiaoxi bus station, where you can take the bus No. 909 to Qijia Huozi Station. Then walk about 300 yards to the Deshengmen bus station.
If you want to save the trouble of transferring, you can take a taxi to cover this distance, and the fare would be CNY45 around.