Returnees are not quarantined. "Baoji was known as Chencang and Yongcheng in ancient times. It is a prefecture-level city under the jurisdiction of Shaanxi Province, a sub-central city of the Guanzhong Plain urban agglomeration, and a sub-central city of the Guantian Economic Zone. After a person returned from Inner Mongolia, he did not take the nucleic acid test and report it, and he did not know he was infected. , running around caused the epidemic to spread seriously. It is located in the western part of the Guanzhong Plain, with a total area of ??18,117 square kilometers and a permanent population of 3.282 million as of the end of 2021.