Agent operation, never give up until the objective is achieved, not only has a core plan but also backup plans and contingency measures. The assassination on the plane is the core plan. If the plan fails, the backup plan will definitely follow up. If there are no agents on the plane, the best opportunity is at the airport or on the way out of the airport, unless those people weren't agents.
Luo Zheng carefully recalled this group's style of action, it didn't seem like the behavior of assassins. The possibility of them being agents is high. Even if assassins would target international police, they wouldn't target Lan Bo, would they? Unless someone hired them, but who would hire someone to kill Lan Bo? If it were a government, they'd just send agents.
