The Encyclopedia on Hanoi City ( EHC ) is a great cultural - scientific work aiming at 1000-year celebration of Thang Long - Ha Noi ( 1010 - 2010 ). It is started to compile in the year of 1993 and assigned to 18 volumes aiming to provide a large readership and research circle with both general & in-depth knowledge regarding Hanoi geography, history, politics, economy, science & technology, education, health care, literature, arts of the long process of historic development from the beginning up to now. The EHC is composed of 18 volumes as following: 1 - History. 2 - Geography. 3 - Politics. 4 - Legal making activity & laws. 5 - Economy. 5 - Science & technology. 7 - Social sciences & humanities. 8 - Education. 9 - Health care. 10 - Literature. 11 - Hanoi spoken language. 12 - Information & publishing activity. 13 - Arts. 14 - Historical vestiges & sites - Museums. 15 - Tourism. 16 - Religion. 17 - Customs & festivals. 18 - Sports & gymnastics. The contents of the Vol. 4 : Legal System: Parts: I - Overview. A historic forms of legal system of Vietnam & of Hanoi from the beginning & up to now. The distinctive features & national identity. II - Legal system of Vietnam & of Hanoi in the feudal times of Ly, Tran, Ho, Le, Tay Son, the Nguyen Dynasties and in the time of French colonialism up to the August 1945. Independence Declaration of the year of 1945. Vietnam Constitutions of the years of 1946; of 1959; of 1980; of 1992. The current legal system of Vietnam & of Hanoi. Legal normative deeds of Hanoi. III - Ancient & old conventions ( HUONG UOC ) of Hanoi & Hanoi villages. IV - Jurisdiction system of Hanoi through historic times. The work of training. V - Inheritance & development of Vietnam national identity on the Statecraft & legal system. VI - Brief contents of some the most fundamental legal deeds.