Why are Beijingers called Alleys and Hutongs?

It's not called Hutong by Beijingers, but Hutong.

But hutong is different from hutong.

There are bungalows on both sides of the hutong, with only one floor.

The alley will be higher and wetter.

Hymns are like alleys, except that the house is short, and the sunshine can come in, which is brighter. The road is generally cement, and there are steps in front of the door, which are wide and narrow.

Give Baidu an explanation (but I don't think it is clear): the planning is quite neat, and the distance between hutongs is similar. The east-west direction is generally hutong, which is relatively narrow, mainly for retaining people. There are generally quadrangles on both sides of hutong.