How to get to 798:
by taxi - tell the driver you want to go to DaShanZi (大山子), JiuXianQiao Lu (酒仙桥路) and stop at the 2nd pedestrian bridge on JiuXianQiao Lu and head down alley Number 2 or 4.
by bus - this is probably the best way, go to the Dongzhimen subway stop and take buses 401，420，405，909，955，991，or 988 (all are within walking distance of the stop) to the DaShanZi (大山子) stop.
Once you get there:
There are a number of great galleries, a few nice cafes to sit and rest, some restaurants, and even a popular nightclub. Stop in Timezone 8 to check out the large collection of art books and to purchase a map of the area.
some old photos:
The Kobe graffiti wall, the first time I saw it I was dumbstruck, this seems far more appropriate in LA than in Beijing!