These are spams from paypal's network from 'paypal consultants' advertising paypal's services in China and offering to help you set up and export using paypal.
The email address I received this at is a throwaway gmail account that is not a paypal user. The only place they could have gotten it is by harvesting.
I contacted Andy Steingruebl (Sr. Manager, Customer and Ecosystem Security at Paypal) on 28 Feb after I got one of these spams, and he said he would look into it. I got another of these spams yesterday and Andy told me "We looked into the previous event and I'll look into this one too. I'm afraid I 'm not going to be able to disclose any details about what we find however".
Given that the emails come from paypal's network and they are from paypal email addresses, and given that they seem to be genuinely advertising paypal's services, I can only assume that paypal's China office is deliberately harvesting email addresses (or purchasing lists of harvested addresses) and spamming people, and paypal seem to be content to let this continue.