It turns out that this is what happened.
These two people just happen to be police officers from the Public Security Bureau, who had just finished discussing matters at the Family Planning Department and saw someone acting suspiciously, looking around from the window.
The two police officers, being new recruits eager to prove themselves, mistook Ge Sanmei, who was peeping around, as a suspect. However, Ge Sanmei explained loudly that she was there with the brigade commander and her husband to handle household registration matters.
The new police officers, adhering to the principle of not wronging a good person, still brought her over, only to find a crowd at the doorstep of the household registration office.