C639 Spiritual Concentration Array

"Thank you, Boss Li, for your favor. I also guarantee that your investment will definitely have a generous return. However, I have been researching this project since I was 20 for more than 10 years. I have encountered a technical bottleneck, and I cannot guarantee when I will succeed in researching it.

To start researching at the age of twenty?

Lee Fei was shocked, this woman was not simple