The key issue is that no one inside the Scavenger organization knows what Liu Feihu is up to, which makes finding him quite difficult.
This mission relies on luck to a certain extent.
Liu Feihu's combat ability falls between that of an expert and a column-general level; he definitely is no match for Ma Lin.
That secretary-general himself is of column-nation level; hence, it is believed that Ma Lin would be able to defeat Liu Feihu with relative ease, especially since Ma Lin's equipment and items are superior to Liu Feihu's, which would give him quite an advantage in combat.
The biggest characteristic of Liu Feihu is that he's extremely slippery and clever; he's tough to deal with and has many tricks up his sleeve when he can't win in a fight.
The secretary-general believes that Ma Lin would not lose to Liu Feihu in this regard.
