Cobra had kidnapped government forces before. Hence, he didn't find it strange. Also, he didn't know much about China. Cobra, who had always been smart and cunning, made a wrong judgment in this matter. This made him think that the Chinese border defense police weren't ordinary. It wasn't like what Luke said, about China being a restricted area for mercenaries.
Hence, Cobra believed that he could enter China.
Luke and Xia Jinyuan, who had infiltrated China illegally, had not returned safely. When Cobra saw Qin Maosheng laughing happily, he laughed too.
The kidnapping of the Chinese female soldier was done well. It would attract the attention of the Chinese border defense police and reduce the danger Luke and Xia faced. This was why when Cobra knew about Qin Maosheng's kidnapping plan, he strongly supported it.