Round. The official seal is the signature seal made by state organs, organizations, enterprises and institutions with their own legal subject behavior names. The official seal of Jiangyin Economic and Information Bureau is circular. The diameter is 4.2cm, the outside is double-sided, the outside is thick, the side width is 0. 1cm, the inside is thin, the side width is 0.0 1cm, the upper arc is the unit name, and it circulates from left to right, and the seal uses simplified Chinese characters.