Have been to Fa-Yian just once, when we were in a que to goto Berco's Middle Circle, CP. It was just a trial and found that the place is quite amazing. It's a small stand-up joint for chinese cuisine and it's got a good standard of food.
Don't miss to check out the veg.spring rolls in appetizers and veg.manchurian & schezwan noodles in main course. The place is pretty inexpensive for regular restaurant-goers!