God's people reunite to one

1 Chronicles 9:1-44
The first to resettle on their own property in their own towns were some Israelites, priests, Levites and temple servants.
The people from Judah numbered 690.
The people from Banjamin numbered 956
The priests, who were heads of families, numbered 1760. They were able men, responsible for ministering in the house of God.
Of the Levites: gatekeepers: numbered 212, some of them charge of the articles used in the temple service; some were musicians; some were responsible for the work day and night.
This section, relating to the 6th centry BC, interrupts the narrative of Saul and David, just beginning.
The Chronicler wants to emphasize continuity: this is the exiles' own history: they belong to and have a part in the story.
He focuses on the resettlement of Jerusalem, listing the people by tribe and family; the priests; the Levites; gatekeepers; those in charge of utensils and stores and musicians.
Banjamin and Judah and Ephraim and Manasseh(two most powerful of the ten breakaway(分離) northern, representing the rest), they are one people again.
Saul's family line, repeated from chapter 8, serves to introduce the particular story beginning in the next chapter.
Why?
Priests came back to Jerusalem more than other tribes for the purpose of resettle is to restore the worship the God at God's temple.
How?
God's people after exile are reunite to one again!