There was no earlier emaim received, and the sender is not my LinkedIn connection (though likely they got my email address there). I spotted the flaws and did not respond, instead filing this report. This is the email I received today: Hello [my first name], It's nice having you on my LinkedIn professional network. Did you receive my previous email about a proposal for Shaanxi Yanchang Co., Ltd. Regards, Hao Shen Director Shaanxi Yanchang Co., Ltd