Four Shanghai officials were punished on Saturday after three staff at a beauty salon tested positive, resulting in about 500 customers becoming close contacts and put tens of thousands under screening.

The Red Rose Beauty Parlor at 1352 Huaihai Road M. in Xuhui District failed to conduct daily nucleic acid tests among its employees as is mandatory. It also failed to ask every customer to scan the venue code or register their information.

The district's market watchdog failed to implement effective monitoring of the hair salon, according to the investigation of the Xuhui government.