After all, Shangguan Xiu's identity is prestigious, so when he visits, no one would refuse, nor dare to refuse.
If An Xiaomian were still the Princess of Country K, she could also openly enter. However, her princess status was previously erased by the official government of Country K. At this moment, An Xiaomian is not married to Shangguan Xiu, so she has no identity that allows her direct access to the Nangong Family.
In the end, Eagle could only come up with one solution: first go to the Nangong Family's entrance, bribe the servants inside, and find out where the adopted child of the Nangong Family is currently living. Then, Eagle, along with two bodyguards, and An Xiaomian will disguise themselves as maids and sneak into the Nangong Family to check if the child is indeed An Qiqi.
