His word.

For a little while, he didn't speak. It wasn't that he couldn't give her the response she sought but he was digesting all that she had said. Holea had just laid a lot of information at his feet. 

If she had not told him this, he doubted that he would have noticed the bitter sweet relationship between Alix and the piano. As a matter of fact, if they made it to one happy year in the marriage, his plan to buy her one of the world's most expensive pianos as a gift. 

He turned his gaze to Holea, his eyes very speculative. Maybe having her in his ear would not be so bad. She may be more reliable than Jin Kang. 

Looking at her with seriousness in his eyes and voice. Caishen answered, "You have my word."

"Thank you." Holea nodded, turned on her heel and walked away as calm as she had been when she approached him.