To buy authentic roast duck, please go to Quanjude Roast Duck Restaurant in Qianmen Street, just south of the front gate building are

candied haws and preserved fruits: there is a commercial street called Dashilan opposite Quanjude, where these things are sold, and it's very convenient

The famous snack bars in old Beijing are

Daoxiangchun

and

Yushanfang

. It's not worse than Quanjude, but Quanjude is the most famous brand in the roast duck industry.

Quanjude and ordinary roast duck restaurants are all baked by hanging stoves, and another roast duck restaurant called Cheap Square is also very famous in Beijing. Their roast duck there is baked by stewing stove. It is said that this stewing roast duck is more suitable for the taste of southerners.