I LOVE THIS PLACE.
When i was in beijing back in the stone age it seems, i used to go to Dazhalan/dashrla to walk around - this is the early 80's and I would pick up a crock of yogurt made by the beijing yogurt (sour milk) company ina little blue and white crock. They had sweet and not so sweet yogurt.
This place makes it. For the US market you can pinkberry it up with fruit and frozen etc. Or just eat a serving of the real stuff in a glass cnotainer - made here.
137 w main st
English name - Blue Cherry
Chinese name - 北京酸奶
enjoy it and support it - it's hard to get non -southern specialty places to stick around. It's not too far from Fosselman's but it's a different taste.