Abou Mohammad Hassan ibn Ali, the Eleventh Imam was born on 8^th day of month: Rabiol Aval, the year: 232 (lunar calendar) in Medina.

His life is divided into three periods:

-     The first period: 13 years in Median

-     The second period: 10 years in Samera, before his Imamate

-     The Third period: about 6 years as during which he was Imam

Imam Hassan Askari (p.b.u.h.) accompanied by his respectful father immigrated from Median to Samera in the year: 243 (lunar calendar) upon invitation of Motevakel Abbasi. What is certain, is the fact that these two respectful Imams were invited to Samera, the center of Abbasid Caliph in that era- in some respects like the policy Mamoon made in making Imam Reza (p.b.u.h.) immigrate to Khorasan. The same policy was for control of the relations of Imam with Shiite and would facilitate for the government the identification of the Shiite who had close relationship with their Imam throughout the Islamic lands who were dangerous to the government.

During the time, Imam was living in this city, except the periods during which he was imprisoned, he was an ordinary citizen and was naturally under complete and cautious supervision of the government. Thus, if Imams of Shiite including Imam Hassan Askari (p.b.u.h.) would enjoy freedom, they would select Medina for living, thus, his long staying in Samera, might not be justified except for the reason that he was arrested by Abbasid Caliph. Thus, such a problem, specially due to existence of a regular network of Shiite which had been formed for a long time, was very important for the caliph and made him worried and terrified. Therefore, to control the same case, they had asked Imam (p.b.u.h.) to report to the government repeatedly his presence in Samera, as according to the narrations of one of the servants of Imam, he had to attend the court every Monday and Thursday. For this reason, it was very difficult for him to have relationships with the Shiite.

On the other hand, the fact that the Shiite were scattered during the ending sixty years of presence of Imam up to the commencement of short period of his absence, lead to consideration of the regular systems for having relationship with the innocent Imam. The same system and network was formed by election of the attorneys by Imams and by creating relationships between Imam and his attorneys, specially on correspondence form, it was tried to present the necessary religious and political guidelines. The same movement continued during the imamate of Imam Hassan Askari (p.b.u.h.).

The people enjoying bright scientific records and also fixed relationship with the previous Imams or with Imam Hassan Askari (p.b.u.h.) and could support the Shiite by narrations, were elected as agents.

There were hierarchies among the agents of the regions, through which financial rights of Imam would be received by the main agent and would be given to Imam, through him.

Creation and preservation of such links would revive the Shiite in the area of cultural and social life and would avoid appearance of any weak point in their organizations. Further, impact of the schools of though such as Vaghefieh and Gholat and the other deviating thoughts among the Shiite, specially those Shiite who were living in the areas far from the residence of Imam were controlled and removed through the same way.

Moreover, enjoying such an exact relationship system would guarantee the current of knowledge and foresight necessary throughout the Shiite communities, as the regions such as Cashmere and Samarqand, though they were very far from the living centers of Imams (p.b.u.h.), were raising an important part of Shiite men of thought

Of course, another important point in such multi-chain relations was preparation of the Shiite for absence of the 12^th Imam (May Almighty God Hasten his Coming). Imam Hassan Askari (p.b.u.h.) had announced to his followers –like his great fathers- the necessary news (specially at that time) and had guided them to wait for Imam and to rebel for him. A sample of such letters, is a handwriting of Imam (p.b.u.h.) to Hossein ibn Babouyeh Ghomi, the great Shiite jurist, reading: “Thou! Ibn Babouyeh! You should be patient and wait for his coming, because the prophet (p.b.u.h.) has prescribed: The best actions of my nation is to wait for his coming.”