Ultrafine dust levels in Seoul reached "bad" on Tuesday for the first time in more than three months after factories started reopening in China.
Three related companies have been fined almost 32 billion won ($27 million) by the Fair Trade Commission (FTC) for an elaborate scheme to squeeze cheap financing from a business partner.
KB Securities was fined 3.8 billion won ($3.2 million) for not handling customer data properly and violating more than one capital market regulation.
SPC Group, which operates the Paris Croissant franchise and such popular imported franchises as Shake Shack and Eggslut, was fined 64.7 billion won for alleged unfair practices of awarding business contracts to its affiliates.
The Fair Trade Commission (FTC) fined Delivery Hero Korea, operator of Yogiyo, 468 million won ($382,000) for taking advantage of its market position to push a lowest price policy on restaurants several years ago.
Starting Tuesday, people won't be allowed to board Korean buses or get into taxis without a face mask. A similar restriction for subway and train users is being discussed as well.