Send a message over email to contact@kaiwenwang.com, and we can see next steps from there. I'm quite organized so it's unlikely I'll forget your message, but send a follow-up if I don't respond within a few days.

It helps to include some of the following when reaching out:

• Who are you? What do you do? Are there any presentations of you on the internet (websites, blogs, social media, papers, projects) that hint what you are like in real life?
• Do we have any mutual context? (programs, experiences, hobbies, people)
• How did you find me? How can we collaborate? What do you need?

Go for bullet points. Your name is already available in your email, so no need to feel constrained by pleasantries, but feel free to write in the mannerism most suitable to yourself.

If you want to say something but you're unsure, just send it even if it's unpolished. I try my best to not take offense. Better to do than to be burdened by what was not not done.