I've never seen this one before, but a little bit of research seems to have uncovered it as a scam.....beware!

(Please forward this to your CEO, because this is urgent. Thanks)

We are a Network Service Company which is the domain name registration center in Shanghai, China. On March 19, 2018, we received an application from Kaisu Ltd requested "imagineentertainment" as their internet keyword and China (CN) domain names (imagineentertainment.cn, imagineentertainment.com.cn, imagineentertainment.net.cn, imagineentertainment.org.cn). But after checking it, we find this name conflict with your company name or trademark. In order to deal with this matter better, it's necessary to send email to you and confirm whether this company is associated with your company or not?

Best Regards,
Charles Liu | Service & Operations Manager
China Registry (Head Office) | 6012, Xingdi Building, No. 1698 Yishan Road, Shanghai 201103, China
Tel: +86-02154290702 | Fax: +86-02154290703 | Mob: +86-13816428671
Email: [email protected]
Web: www.chinaregistry.cn

This email contains privileged and confidential information intended for the addressee only. If you are not the intended recipient, please destroy this email and inform the sender immediately. We appreciate you respecting the confidentiality of this information by not disclosing or using the information in this email.
Apparently they somehow then try to sell your own domain back to you (not sure how).