About sequences of jun family

Sequence are divided from 1 - 10 sequence.Higher than it is Zero sequence.Only in Many 'Eras' can a Zero sequence be born...Spoiler..MC father was zero sequence of previous Era..

Sequence will only be given to the strongest of the young generation.

As zero sequence are rare in eras,so normally the first sequence of the era will become th head of the family.But if there are zero sequences,then without any prblem he will become the head.

Era - It is the time when an emperor is born.After one person becomes emperor(for the next ten thousand years;There can be no emperor).So the Era actually varies,It actually depends on how fast a person can become emperor.

Abou the emperor check previous chapter(auxilary)