You will come across this kind of solicitation emails from various Chinese domain name registries from time to time. Generally, they would search the database and find if there are any domain names similar to an established company but not registered yet. They will then send an email to this company, claiming that there is another applicant seeking to register such a domain name, so as to create some sort of urgency.

You better off registering those domain names on you own, using a reliable registrar and do not need to pay the extra fees through those solicitors (who would typically charge a high fee for registration).