My hukou is in Beichen, and now I live in Dongli District. Can I apply for single-parent social security in Dongli District?

You can't. According to "People's Republic of China (PRC) Social Insurance Law", as of July 17, 2023, Tianjin's single-parent social security payment needs to be handled by the social security bureau where the household registration is located, so my household registration is in Beichen, and now I live in Dongli District, so I can't handle the single-parent social security in Dongli District. Beichen District under the jurisdiction of Tianjin. Located in the northern part of Tianjin, it is adjacent to Ninghe District in the east, facing Dongli District across Jinzhong River and Xinkai River in the southeast, Hebei District and Hongqiao District in the south, Ziya River in the southwest and wuqing district in the west and north, with a total area of 478.48 square kilometers.