To which department does Xi's custody class complain and report?

Market supervision department. The market supervision department is responsible for the comprehensive supervision and management of the market. If there are irregularities in supervision and management, you can also accept complaints from the public, so Xi' an custody class complains and reports to the market supervision department. Xi 'an, referred to as "Gao", was called Chang 'an and Haojing in ancient times. It is the capital of Shaanxi Province, a sub-provincial city, a megacity and the core city of Guanzhong Plain urban agglomeration.