Why are the first three episodes called Little Hong Kong?

Because the per capita land of the first three groups is only 0.68 mu, and the Lanlang Highway runs through the whole territory, the traffic is very convenient, so it is called Little Hong Kong. Sanjiaji Town, which belongs to Guanghe County, Linxia Hui Autonomous Prefecture, Gansu Province, is located in the east of Guanghe County, facing Xindian Town and Dingxi City across the river in the east, Shuiquan Township in the south, Qijiaji Town in the west, and Guoyuan Township and Chejiawan Township in Dongxiang Autonomous County in the north.