Answer:
Dear [friend's name],
I am so happy to hear about your success as a businessman! It is always great to hear about the achievements of those we care about.
As for me, since we last saw each other, I have also been working hard to make progress in my own career. I have been focusing on [specific career or industry], and have been fortunate enough to have some success in this field. I have been able to [specific achievement or accomplishment], and I am currently working towards [future goal or project].
I am excited to see where my career takes me in the future, and I am grateful for the support and encouragement of people like you.
Let's catch up soon and catch up on old times!
Best,
[Your Name]