Faced with Christopher's questioning, Vivian remained silent for a moment.

After a while, she spoke up, "Just like you, Christopher, I also have some secrets. I hope you can understand."

Vivian saw the suspicion in Christopher's eyes and then said solemnly.

"But I can assure you. I didn't come here to snatch that formula. It's useless for me. These people are only doing this for their own interests, for money."

"But I don't lack money. I can earn more through any ...