A major Chinese online travel platform saw its Hong Kong-listed shares tumble 6.5% today, closing at HKD569.50 (approximately USD73.04 per share), following a significant development: the country's market regulator has launched an antitrust investigation into the company. The probe centers on allegations of abuse of market dominance, marking a major regulatory action against the sector's leading player. Market participants are closely monitoring how this enforcement action might reshape competitive dynamics in China's travel and booking industry, with broader implications for how regulators approach tech-driven service platforms.