How did "Hutong" come from?

The source of Hutong is as follows:

1, from Mongolian. Hutong, the source of Odum in Mongolia. People in the Yuan Dynasty called the streets and lanes hutongs, and later they were the general names of the streets and lanes in the north. Hutong, also known as "alley", "alley" and "alley", refers to a relatively small street between the main streets of a town or country, which always leads to the interior of residential areas.

2. The word Hutong first appeared in Yuan Zaju. In Guan Hanqing's "Single Knife Meeting", there is a saying of "bloody alley". In the Yuan zaju "Shaman Island and Boiling the Sea with Cattle", Zhang Yu asked Xiangmei, "Where do you live?" Xiang Mei said, "My family lives in Zhuantar Hutong." Zhuanta Hutong is in Xisi South Street, and the place name has not changed.

3. Beijing Hutong. Some people call Beijing's ancient capital culture "Hutong Culture" or "Siheyuan Culture".