According to the notice of Changchun epidemic command center, the risk areas are scientifically and accurately divided. According to buildings, units, floors and households, high-risk areas shall be demarcated and shall not be expanded at will. No temporary blockade in any form is allowed. Therefore, it is completely unsealed.

Changchun, formerly known as Xi Du and Chachong, is a prefecture-level city, provincial capital, sub-provincial city and I-type big city, and is the core city of Harbin-Changzhou urban agglomeration under the jurisdiction of Jilin Province. It is one of the central cities and important industrial bases in Northeast China approved by the State Council.