What if Oliver revealed to China White what she owed him? Namely, her life.
"Move away from him."
"Make me."
Oliver and China White charged at one another as the police closed in on the premises, trading blow for blow, bow against knives as they fought in front of the captured Martin Somers.
"You fight well, for an American." China grudgingly noted as Oliver blocked another strike.
"Well, I had to learn how to defend myself, especially when it came to saving the lives of people."
"Whoever you are, you're no hero." She spat as they continued to battle, eager to finish this battle off and escape before the police could close in on her.
"I saved your life once before. I think that makes me somewhat heroic, even if you don't deserve it." Oliver smirked as she looked at him in shock. The Hood had saved her life? When?
"When did you save my life?" She asked, intrigued that the vigilante was deluded enough to believe he'd saved her, she was an honest crook after all, if she did owe him her life, she'd spare him, this time.
"Five years ago, Ferris Air Line to Hong Kong, you were on it."
"How do you know?" China asked, wondering how he could know what airline she flew with.
"There was a missile aimed at your plane, aiming to kill you. Who do you think stopped it?"
"You saved my life, Vigilante?" China asked, shocked. He seemed to be telling the truth, this once, she'd spare his life.
"I did, so where does that leave us? I need this man and he's useless to you now that he's been compromised."
"Indeed. I will allow you to leave here, alive. But we are even, after tonight, if you interfere with us again, you will die." China asserted, as she lowered her weapons and prepared to leave.
As China walked out, Oliver quickly notched his bow and fired an arrow, followed by another, into her back, knocking her to the ground. As she bled out and felt the strength leave her, Oliver stood over her sadly.
"You are a threat to the safety of this city and I have to make sure this city is healed. China White, you have failed this city."
Bit random for him to just murder, yeah, but she would be a threat so he decided to take action quickly.