Why can't security guards get into the supermarket opened by Hengbo?

Hengbo security guards cannot enter the supermarket opened by Hengbo, because as long as they leave, all Foxconn security guards will be hacked. Hengbo Property is a property signed by Foxconn. Security guards who have worked in Hengbo cannot be employed in Foxconn. The current rule is that security guards who have worked in Hengbo can never be employed in Foxconn.