Sending Liang Dong to Somalia is Little Donnie's job, and what else would a mercenary broker be doing? Although the main role of a mercenary broker is to find gigs and bring in business, Satan isn't taking any assignments now, so Little Donnie has become a full-time caretaker.
To be fair, a broker usually doesn't just work with one mercenary group. They introduce mercenary groups to employers and match suitable jobs with the right mercenary group—that's the norm for brokers.
Little Donnie ended up being Satan's exclusive broker because of Satan's status and power. Another reason is that Little Donnie and Satan have an unusual relationship, which obviously sets them apart from your typical mercenary and broker.
Liang Dong needs to first acclimate at the forward base and also brush up on his combat skills.
On the flight back to New York, Gao Yang had Liang Dong join him. In New York, he handed Liang Dong over to Little Donnie, and then Gao Yang took Joseph home.
