Tai Xuan VS Xue Ning

At this, Wei Yan and Ming Guang startled in surprise. This civilian woman could tell they were bodyguards without being told?

Perhaps she heard Miss Li talking to her son when she introduced them. That was a more likely explanation for things - they've taken special care to seem like normal visitors, especially because this was a small sleepy town, and they didn't want to attract more undue attention than necessary. 

"That's highly unnecessary - " Ming Guang began, ready to protest. 

"Mom, how can you leave people outside?" Xue Ning asked, also not liking her mother's idea. 

"Just for a while, they'll live." Her mother replied peacefully. "I'll invite them back in later when I'm done. What do you think, Jingwei?" 

Jingwei thought for a brief moment, and agreed. "Sure thing! That's fine with me."

"Mr Sun, you cannot be serious!" Ming Guang despaired. Wei Yan also looked shocked.