Cobra was in other people's territory now, so he wasn't worried that he would encounter any danger on the way. He wasn't worried that he would be killed by Qin Maosheng because he had gained the admiration of Commander Minlai.
A cunning fellow wouldn't do anything that would make his backer hate him.
He clearly expressed his intention now. If Qin Maosheng really had the intention to cooperate with him, he would definitely send someone to bring Luke and Xia back. This was because the cunning and smart Qin Maosheng knew that since he couldn't do something that backer hated, he might as well settle the matter with his partner properly and let his backer believe that he had the ability to earn more money.
Of course, this wasn't the real reason why Cobra agreed to take a look at how the Chinese female soldiers were treated. He wanted to know how resourceful Qin Maosheng was. He was so arrogant that he dared to kidnap soldiers from a peaceful country.