I received several submissions on this forum and ignored them directly. I have almost fifty invention patents. The content is the same, so the invitation letter is just to trick people into going there to make money. If someone really takes a fancy to your talent, they will call you and invite you directly, covering your travel expenses, accommodation, and possibly giving you money. You should slowly cultivate your little cleverness into great wisdom. When I got my first invention patent when I was 20 years old, everyone was disappointed. I spent a year looking for people to invest in it. Now I use all my time and energy to invest in myself. Now I am 25 years old and have accumulated more than 50 inventions. Don't waste your time on these things, it's impossible to get rich suddenly and it will only make you poorer