可以参考这个模板： Hi **, Good afternoon/morning/day. This is ** from China. I am also in ** industry, and I have some
questions need your help. Could you pls kindly accept my invitation?
Thanks in advance. *** Best regards
或者 Dear **, This is ***, I am very glad to know you on LinkedIn. And I hope to be
connected with you and talk more about ** (一定要是对方能感兴趣的points) in further
days together. Best regards, ***