Which expression is correct? Many thanks!!
1. Let's invite him to make an introduction for his new book.
2. Let's welcome him to make an introduction for his new book.
3 Lets invite him to do an introduction for his new book.
4. Let's welcome him to do an introduction for his new book.

Question

Answer

The best of the four would be:
1. Let's invite him to make an introduction for his new book.
It would usually be said like this:
Let's invite him to give an introduction for his new book.

We usually say 'give an introduction', though 'make' and 'do' would be understood.