Fuyun Mountain Mining Area was far from Xiangdu Capital, situated on a secluded island. Moreover, this island was located on the high seas at the border between Xiangdu and another country.
Xiangdu, being a special administrative region under the policy of "one country, two systems," had somewhat chaotic public security, especially in the border area where mineral veins abounded, involving many economic interests. Often, criminals from both countries would masquerade as bandits in the area.
Although firearms in Xiangdu were also under government control, for wealthy tycoons like Xie Junhao, the firearms ban was utterly ineffective.
Not only did Xie Junhao have a large arsenal of guns and ammunition at home, but he also equipped a security detail with firearms. Moreover, even Xiangdu government officials like Officer Mike allowed their own police personnel to hold important positions within the security team.