Family-linked companies won 99 modular classroom contracts worth about 130 billion won ($94 million) over four years by coordinating bid prices and using smaller firms as sham bidders. The Anti-Corruption and Civil Rights Commission examined contracts at 33 elementary, middle and high schools across 13 regions and referred suspected violations to the Korea Fair Trade Commission, National Police Agency, Public Procurement Service and education offices. Companies A and B won about 31% of 324 catalog contracts between July 2022 and July this year, while Company C participated without winning to support the alleged scheme. The commission also found collusion involving principals and school staff, with catalog-contract prices ranging from 1.5 to three times those under standard total-price bidding, and identified weak indoor-air-quality inspection practices by education authorities.