In which episode did YeHua recognize Bai Qian as mr.zhou?

To the sky kingdom YeHua recognized Bai Qian as Mr. Zhou's 3 1 episode. YeHua burned the white silk torn from the white front. If mr.zhou's article is sure to emit cyan, sure enough, Bai Si will emit cyan light when she meets the knot lamp. YeHua more affirmed his guess. Even when Song entered the room, he turned off the lights himself. While Zheng Song was wondering, YeHua told him that she couldn't stand mr.zhou's body for three hundred years, because she was not dead. Now that she has found mr.zhou, she is the wife of Bai Qian and Qing Qiu.