Have been Beijing many times, finally walk in the restaurant--Dong Lai Shun. Crowds people stood and waited outside. 
They served the appetite before menu.
While in Beijing, must try No.1 hot lamb pot, 100-year history restaurant which has won many awards.
Copper pot with beautiful lamb + beef slice and vegetables, full of table. Food was genuinely delicious, particular melt in rich sesame peanut sauce. 
Lamb BBQ. 
I don't love lamb, what I love eat is Tufu with peanut sesame sauce :)
