1. Economic factors: Yanjiao's economy is relatively underdeveloped, and the government does not have enough funds to build cultural facilities such as libraries. In addition, Yanjiao, as a rapidly developing city, pays more attention to infrastructure construction and economic development, but lags behind in the construction of cultural facilities. As a result, Yanjiao does not have enough funds and cultural resources to build a library.

2. Cultural factors: Yanjiao's cultural atmosphere is relatively weak, and people's demand and attention to cultural life may not be high enough. Therefore, the local government and residents pay less attention to the construction of cultural facilities and prefer to use the library resources in Beijing. So the demand for libraries in this area is relatively low, which is one of the reasons why there is no library in Yanjiao.