A strong fortress is always torn apart from within, the captain understood this truth well. Luo Zheng's reminder made him consider the possibility of a bomb. If there was a bomb on the plane, how did the perpetrator get it on board? Who would believe there wasn't an insider? However, crew members also go through security, just as strictly as passengers, so they couldn't help unless they were working with the ground staff.
Thinking about this, the captain looked at Luo Zheng suspiciously and whispered, "Our people didn't have the opportunity to bring a bomb onboard. Only the airport ground staff would have the chance, but it's slim. What do you mean?"
"The note." Luo Zheng saw the captain didn't quite understand, so he pointed it out and, seeing the captain still confused, reluctantly explained, "I watched the surveillance, and no passenger had the opportunity to pass a note to the trolley-serving flight attendant. I suspect someone internal used other staff to transmit the note."
