What time is the earliest security check at Baiyun Airport?

Three o'clock. According to Jinyang official website. Com, the check-in counter of Baiyun Airport opens at 3: 30 a.m. in advance, and all check-in counters are fully opened at 4: 00 a.m. Correspondingly, five security check-in channels are opened at 3: 00 a.m. to guide self-service check-in machines and QR code passengers, and 68 channels are fully opened at 4: 00 a.m..