Duty 

"Dutifully performing your task isn't just about the doer, but also the giver." Huo Ling said. "The giver entrusts themselves to the doer. The giver should have a full trust to the doer. So, he should choose the doer wisely, if he could entrust his life to the doer. But, at that time, there's only me and Jason Baurne who hated each other. But what could Jonathan do?" he bitterly smiled. "Jason really loses too much on the task. I can betray him anytime, and I chose to betray him." He said. 

"Why did Jason want to kill Hao Baiyun and Gu Xingfeng.?" Yi Bing asked. 

"It's only Hao Baiyun who's he intended to kill. Since Gu Xingfeng is protecting Hao Baiyun, he's just the icing on the cake." Huo Ling said. "Jason… he is suspecting the aristocrats got something to do with his parents' death. Hao Baiyun is left in the open, likewise Gu Xingfeng. They separated from their families, so their families can't protect them. He planned to start with them two." He explained.