Restaurants:
Sichuan Pavilion - DC, K st NW (clean, spicy, busy, $$, ok)
Peking Gourmet Inn - VA Falls Church (Clean, very busy, $$, good)
Joe's Noodle - MD Rockville (spicy, busy, $, good)
Bob's Noodle 66 - MD Rockville (Taiwanese food, busy, $$, good)
For Dim sum:
China Garden - VA Rosslyn (Metro, busy, $, ok, weekend)
Oriental East Restaurant - MD Silver Spring (Metro, busy, $, good, weekend)
Grocery:
Google "Great Wall", "H Mart"