1, yes, unknown. There must be more or less, and such a problem will not be recorded in the history books.

2, yes, it can't be next to the emperor's bedroom. Because it doesn't make sense from the perspective of safety and etiquette.

3. No, you can't. Except for the prince who is given certain responsibilities.

4, such as the Northern Wei Dynasty Prince

Qinghe Wang Tuoba Shao;

Yangping Wang Tuoba;

Wang Tuoba of Henan;

Hejian Wang Tuoba Xiu;

Changle Wang Tuoba Chuwen;

Wang Guangping Tuoba GUI;

King Tuoba Li of Jingzhao.

After sealing the king, the princes can control the army by sealing the border and have the right to govern the people. They are local owners.