Generally speaking, the market supervision administration works normally from Monday to Friday, and Saturday and Sunday are rest days. If you don't go to work, you'd better go before the working day.
Market Management Supervision Bureau, whose supervisory duties cover the responsibilities of the former industrial and commercial administration, quality and technical supervision, intellectual property rights (trademarks, patents, copyrights), price, catering supervision (other fields belong to the functions of the Food and Drug Administration or the Health Bureau), and alcohol product supervision.