If you want to get to Dafen Wal-Mart from Sha scare,

If you don't need to change trains, you can take two roads, one is to take the 38B bus to Sha scare platform, and the other is to take the 651 bus to Wanzhong City and Niulanqian Village platform of Bulong Highway.

The first road is a detour, and it takes a long time, about 5 minutes. The second one is more time-saving.

I suggest you take 651 to Wal-Mart. Time is precious.