According to the plan, Cheng Ziang's side was to be responsible for special operations, looking for the rebel base opposing Lipei and capturing all their leaders to bring back to Lipei for trial.
Originally, Lin Wei had doubts about Cheng Ziang leading special operations, but Wang Xu spoke up for him time after time, convincing Lin Wei. After all, Cheng Ziang was indeed very capable; he not only found the mastermind behind the assassination attempt on Luo'er through careful investigation but also linked the attack on Luo'er with the attack on Lipei, identifying the true mastermind behind the entire event.
It could be said that without Cheng Ziang's thorough investigation, headquarters would have likely spent a long time unable to identify the true source of the attacks, left to tirelessly respond to rescue calls.