The old Beijing chicken roll was initiated by KFC, and it has nothing to do with old Beijing and Kyoto, New Taipei. There is no such thing in old Beijing. Tracing back to the source, it can be said that it is a simplified reduced version of the burrito (it is insulting to Mexicans to say that it is a reduced version of the burrito). Anyone who has eaten a real burrito knows that it is a national quintessence and a proud food culture. KFC should change its name to him. It doesn't deserve to be called old Beijing, let alone old Beijing.
Beijingers do roll things with pancakes, but it's definitely not fried chicken fillet, such as rolled elbow with sauce, rolled eggs, rolled fried dishes and so on.