How to arrive the Dongzhimennei street?

Here are two transport ways for you:
One is to take bus no. 106 at Beijing South Railway Station anf get off at Dongzhimennei Station. Then you can walk to Dongzhimennei Street very fast.
The other way is to take the subway. At Beijing South Railway MTR Station, you can take subway line 4 to Xuanwumen Station. There you need transfer to subway line 2 and get off at Dongzhimen Station. Getting out of the southwest Exit D of subway line 2, it is very close to Dongzhimennei Street.
May it help.