Yan Ji's killing move halted mid-air, and in truth, her heart was much like Han Ji's.
Han Ji, who previously held the evidence, didn't really want Yan Ji dead, and now that Yan Ji had the upper hand, she didn't truly wish to kill Han Ji either.
"But she... might report us."
Yan Ji said, conflicted. She had seen what she shouldn't have, and if she let it slip, the consequences could be enormous.