Xu Jiayin went downstairs and saw Lu's car at the entrance of the community. Xu Jiayin went over and sat in Lu's car.

"Haven't you waited a long time?" Xu Jiayin asked.

"No, I've just arrived, too," Mr. Lu said as he drove.

Xu Jiayin did not speak any more.

I looked at Xu Jiayin and thought about it. I said, "Jiayin, I'll send you back after your class today. My sister-in-law may not be at home today."

"What's wrong? Is Ning Xuan on a business trip? Xu Jiayin asked in surprise.

"No, something happened between Hao Xuan and her sister-in-law, and she went out and was not at home."...