As the person pushed forward by Japan to reclaim the property rights of Dream Island, Haruji Harada began investigating Yan Fei's intelligence the moment he took on this task, so he had an intimate knowledge of Yan Fei early on. Haruji Harada knew that Yan Fei had a secret account on the Dark Web called "Fei Ping," and he also knew that once Yan Fei used this account to publish a task, it would surely be picked up by the Destroyer.
Once the Destroyer took on the task, the completion rate was guaranteed to be one hundred percent. No matter how absurd or difficult the task was, the Destroyer never had a record of failure. Now that Yan Fei had just released a bounty task, a person suspected to be the Destroyer appeared in the Tokyo suburbs, destroying the Nishino Ward Office that held the fake marriage certificate of Haruji Harada and Princess Kako. This was certainly no accident, but a deliberate move by Yan Fei against him.